[MINOR][DOC] Fix doc for web UI https configuration
[MINOR][DOC] Fix doc for web UI https configuration

## What changes were proposed in this pull request?

Doc about enabling web UI https is not correct, "spark.ui.https.enabled" is not existed, actually enabling SSL is enough for https.

## How was this patch tested?

N/A

Author: jerryshao <sshao@hortonworks.com>

Closes #17147 from jerryshao/fix-doc-ssl.

dhruve/spark,nchammas/spark,mahak/spark,someorz/spark,icexelloss/spark,rekhajoshm/spark,xuanyuanking/spark,cin/spark,skonto/spark,HyukjinKwon/spark,adrian-ionescu/apache-spark,wangmiao1981/spark,eyalfa/spark,esi-mineset/spark,poffuomo/spark,BryanCutler/spark,JoshRosen/spark,alunarbeach/spark,jkbradley/spark,liyichao/spark,facaiy/spark,markhamstra/spark,joseph-torres/spark,xflin/spark,nlalevee/spark,bdrillard/spark,ddna1021/spark,shaneknapp/spark,ConeyLiu/spark,brad-kaiser/spark,srowen/spark,aray/spark,akopich/spark,jiangxb1987/spark,caneGuy/spark,dbtsai/spark,byakuinss/spark,mahak/spark,map222/spark,goldmedal/spark,ericvandenbergfb/spark,nilsgrabbert/spark,someorz/spark,rednaxelafx/apache-spark,UndeadBaneGitHub/spark,techaddict/spark,sachintyagi22/spark,ioana-delaney/spark,esi-mineset/spark,mdespriee/spark,setjet/spark,caneGuy/spark,sachintyagi22/spark,ericvandenbergfb/spark,shubhamchopra/spark,1haodian/spark,jrshust/spark,skonto/spark,WeichenXu123/spark,highfei2011/spark,mike0sv/spark,milliman/spark,ueshin/apache-spark,BryanCutler/spark,hhbyyh/spark,mahak/spark,rikima/spark,xflin/spark,aosagie/spark,sureshthalamati/spark,ptkool/spark,rednaxelafx/apache-spark,wangyum/spark,liutang123/spark,mzl9039/spark,ajaysaini725/spark,debugger87/spark,maropu/spark,eyalfa/spark,kevinyu98/spark,lxsmnv/spark,kiszk/spark,guoxiaolongzte/spark,wzhfy/spark,ajaysaini725/spark,bOOm-X/spark,ajaysaini725/spark,facaiy/spark,dbtsai/spark,alunarbeach/spark,zzcclp/spark,UndeadBaneGitHub/spark,huang1900/spark,sachintyagi22/spark,zhouyejoe/spark,wangmiao1981/spark,LantaoJin/spark,facaiy/spark,milliman/spark,zero323/spark,vinodkc/spark,apache-spark-on-k8s/spark,1haodian/spark,facaiy/spark,tejasapatil/spark,xflin/spark,wangmiao1981/spark,rikima/spark,debugger87/spark,hhbyyh/spark,ron8hu/spark,wangyum/spark,chuckchen/spark,sureshthalamati/spark,janewangfb/spark,cin/spark,skonto/spark,vinodkc/spark,alunarbeach/spark,WindCanDie/spark,mike0sv/spark,jrshust/spark,zhouyejoe/spark,UndeadBaneGitHub/spark,akopich/spark,szhem/spark,alunarbeach/spark,poffuomo/spark,Aegeaner/spark,lxsmnv/spark,lvdongr/spark,eyalfa/spark,janewangfb/spark,yanboliang/spark,witgo/spark,jrshust/spark,publicRoman/spark,szhem/spark,brad-kaiser/spark,vinodkc/spark,skonto/spark,skonto/spark,hhbyyh/spark,saturday-shi/spark,mahak/spark,jlopezmalla/spark,icexelloss/spark,saturday-shi/spark,aosagie/spark,mzl9039/spark,bravo-zhang/spark,jkbradley/spark,setjet/spark,1haodian/spark,saturday-shi/spark,chuckchen/spark,witgo/spark,nilsgrabbert/spark,holdenk/spark,nilsgrabbert/spark,bdrillard/spark,goldmedal/spark,spark-test/spark,rikima/spark,liyichao/spark,mahak/spark,markhamstra/spark,shaneknapp/spark,dhruve/spark,panfengfeng/spark,darionyaphet/spark,ahnqirage/spark,kevinyu98/spark,stanzhai/spark,highfei2011/spark,yanboliang/spark,highfei2011/spark,adrian-ionescu/apache-spark,nlalevee/spark,aray/spark,liutang123/spark,nlalevee/spark,zhouyejoe/spark,minixalpha/spark,map222/spark,liyichao/spark,someorz/spark,sureshthalamati/spark,sahilTakiar/spark,publicRoman/spark,tengpeng/spark,wangyum/spark,rednaxelafx/apache-spark,rekhajoshm/spark,goldmedal/spark,cloud-fan/spark,loneknightpy/spark,debugger87/spark,JoshRosen/spark,pgandhi999/spark,WindCanDie/spark,ahnqirage/spark,gengliangwang/spark,lvdongr/spark,Aegeaner/spark,ajaysaini725/spark,yanboliang/spark,hhbyyh/spark,darionyaphet/spark,loneknightpy/spark,JoshRosen/spark,MLnick/spark,rednaxelafx/apache-spark,WeichenXu123/spark,sachintyagi22/spark,darionyaphet/spark,mike0sv/spark,bravo-zhang/spark,wangmiao1981/spark,SHASHANKB/spark,huang1900/spark,highfei2011/spark,actuaryzhang/spark,shuangshuangwang/spark,milliman/spark,huang1900/spark,alunarbeach/spark,techaddict/spark,WindCanDie/spark,minixalpha/spark,zero323/spark,ConeyLiu/spark,liyichao/spark,mdespriee/spark,bdrillard/spark,ahnqirage/spark,facaiy/spark,narahari92/spark,kissmetrics/spark,janewangfb/spark,mahak/spark,nlalevee/spark,lxsmnv/spark,jianran/spark,dbtsai/spark,ericvandenbergfb/spark,hvanhovell/spark,taroplus/spark,liutang123/spark,liyichao/spark,wangyum/spark,gengliangwang/spark,jkbradley/spark,apache/spark,MLnick/spark,chuckchen/spark,hhbyyh/spark,tengpeng/spark,liutang123/spark,tengpeng/spark,gengliangwang/spark,ron8hu/spark,ddna1021/spark,icexelloss/spark,ptkool/spark,dongjoon-hyun/spark,apache/spark,panfengfeng/spark,pgandhi999/spark,bdrillard/spark,someorz/spark,zhouyejoe/spark,jianran/spark,milliman/spark,holdenk/spark,bravo-zhang/spark,shuangshuangwang/spark,liutang123/spark,rikima/spark,aokolnychyi/spark,spark-test/spark,mike0sv/spark,lvdongr/spark,dongjoon-hyun/spark,maropu/spark,JoshRosen/spark,HyukjinKwon/spark,janewangfb/spark,hvanhovell/spark,stanzhai/spark,jianran/spark,srowen/spark,BryanCutler/spark,facaiy/spark,saturday-shi/spark,akopich/spark,spark-test/spark,map222/spark,HyukjinKwon/spark,xuanyuanking/spark,holdenk/spark,map222/spark,jrshust/spark,kissmetrics/spark,zuotingbing/spark,aokolnychyi/spark,nchammas/spark,BryanCutler/spark,tengpeng/spark,bOOm-X/spark,kiszk/spark,srowen/spark,caneGuy/spark,WeichenXu123/spark,JerryLead/spark,shubhamchopra/spark,aray/spark,caneGuy/spark,dongjoon-hyun/spark,debugger87/spark,michalsenkyr/spark,joseph-torres/spark,sureshthalamati/spark,bravo-zhang/spark,ueshin/apache-spark,shuangshuangwang/spark,brad-kaiser/spark,shaneknapp/spark,kevinyu98/spark,cloud-fan/spark,shuangshuangwang/spark,dhruve/spark,dhruve/spark,rezasafi/spark,rezasafi/spark,ron8hu/spark,minixalpha/spark,esi-mineset/spark,saturday-shi/spark,publicRoman/spark,andrewor14/spark,hvanhovell/spark,xuanyuanking/spark,andrewor14/spark,rikima/spark,panfengfeng/spark,publicRoman/spark,rekhajoshm/spark,cloud-fan/spark,ericvandenbergfb/spark,UndeadBaneGitHub/spark,pgandhi999/spark,joseph-torres/spark,saltstar/spark,icexelloss/spark,brad-kaiser/spark,maropu/spark,jrshust/spark,mzl9039/spark,tejasapatil/spark,mdespriee/spark,hvanhovell/spark,bOOm-X/spark,MLnick/spark,zzcclp/spark,alunarbeach/spark,Aegeaner/spark,markhamstra/spark,aokolnychyi/spark,szhem/spark,apache-spark-on-k8s/spark,UndeadBaneGitHub/spark,setjet/spark,bdrillard/spark,srowen/spark,kissmetrics/spark,guoxiaolongzte/spark,esi-mineset/spark,lvdongr/spark,cin/spark,esi-mineset/spark,pgandhi999/spark,SHASHANKB/spark,WeichenXu123/spark,michalsenkyr/spark,akopich/spark,michalsenkyr/spark,nchammas/spark,bdrillard/spark,cloud-fan/spark,mzl9039/spark,sureshthalamati/spark,bOOm-X/spark,huang1900/spark,mdespriee/spark,milliman/spark,dongjoon-hyun/spark,aosagie/spark,mike0sv/spark,kiszk/spark,sureshthalamati/spark,ueshin/apache-spark,shaneknapp/spark,bdrillard/spark,adrian-ionescu/apache-spark,apache-spark-on-k8s/spark,kevinyu98/spark,jianran/spark,milliman/spark,guoxiaolongzte/spark,eyalfa/spark,map222/spark,jiangxb1987/spark,srowen/spark,someorz/spark,loneknightpy/spark,darionyaphet/spark,brad-kaiser/spark,LantaoJin/spark,shubhamchopra/spark,actuaryzhang/spark,ddna1021/spark,jlopezmalla/spark,caneGuy/spark,jlopezmalla/spark,jiangxb1987/spark,wangyum/spark,poffuomo/spark,andrewor14/spark,poffuomo/spark,cloud-fan/spark,nlalevee/spark,WeichenXu123/spark,zzcclp/spark,LantaoJin/spark,maropu/spark,nlalevee/spark,HyukjinKwon/spark,byakuinss/spark,panfengfeng/spark,szhem/spark,xuanyuanking/spark,markhamstra/spark,icexelloss/spark,witgo/spark,xuanyuanking/spark,spark-test/spark,zero323/spark,jiangxb1987/spark,xflin/spark,Aegeaner/spark,techaddict/spark,JerryLead/spark,zuotingbing/spark,LantaoJin/spark,aray/spark,stanzhai/spark,xuanyuanking/spark,mahak/spark,ron8hu/spark,publicRoman/spark,sahilTakiar/spark,cin/spark,bOOm-X/spark,MLnick/spark,techaddict/spark,dbtsai/spark,srowen/spark,byakuinss/spark,ddna1021/spark,dongjoon-hyun/spark,1haodian/spark,patrick-nicholson/spark,ajaysaini725/spark,goldmedal/spark,ioana-delaney/spark,aokolnychyi/spark,rikima/spark,jlopezmalla/spark,ConeyLiu/spark,goldmedal/spark,goldmedal/spark,jrshust/spark,1haodian/spark,panfengfeng/spark,poffuomo/spark,rednaxelafx/apache-spark,huang1900/spark,byakuinss/spark,zzcclp/spark,SHASHANKB/spark,dhruve/spark,BryanCutler/spark,jlopezmalla/spark,michalsenkyr/spark,loneknightpy/spark,SHASHANKB/spark,hvanhovell/spark,andrewor14/spark,jkbradley/spark,mzl9039/spark,UndeadBaneGitHub/spark,holdenk/spark,tejasapatil/spark,JoshRosen/spark,JoshRosen/spark,hhbyyh/spark,ConeyLiu/spark,minixalpha/spark,taroplus/spark,cloud-fan/spark,SHASHANKB/spark,witgo/spark,janewangfb/spark,patrick-nicholson/spark,minixalpha/spark,rednaxelafx/apache-spark,apache-spark-on-k8s/spark,jianran/spark,alunarbeach/spark,kiszk/spark,janewangfb/spark,zero323/spark,shaneknapp/spark,tengpeng/spark,sahilTakiar/spark,wzhfy/spark,apache-spark-on-k8s/spark,bOOm-X/spark,joseph-torres/spark,1haodian/spark,aray/spark,stanzhai/spark,ptkool/spark,xflin/spark,saturday-shi/spark,aosagie/spark,UndeadBaneGitHub/spark,vinodkc/spark,tejasapatil/spark,sureshthalamati/spark,aosagie/spark,ericvandenbergfb/spark,lvdongr/spark,zuotingbing/spark,HyukjinKwon/spark,stanzhai/spark,ahnqirage/spark,wzhfy/spark,zhouyejoe/spark,adrian-ionescu/apache-spark,byakuinss/spark,dbtsai/spark,apache/spark,sahilTakiar/spark,andrewor14/spark,setjet/spark,actuaryzhang/spark,rezasafi/spark,cloud-fan/spark,patrick-nicholson/spark,holdenk/spark,sachintyagi22/spark,michalsenkyr/spark,rezasafi/spark,BryanCutler/spark,rikima/spark,aray/spark,patrick-nicholson/spark,szhem/spark,szhem/spark,kissmetrics/spark,dbtsai/spark,narahari92/spark,Aegeaner/spark,map222/spark,kevinyu98/spark,SHASHANKB/spark,shaneknapp/spark,Aegeaner/spark,saltstar/spark,1haodian/spark,saltstar/spark,dongjoon-hyun/spark,icexelloss/spark,zzcclp/spark,ptkool/spark,patrick-nicholson/spark,ddna1021/spark,JerryLead/spark,zzcclp/spark,highfei2011/spark,someorz/spark,darionyaphet/spark,saltstar/spark,chuckchen/spark,debugger87/spark,caneGuy/spark,shaneknapp/spark,lxsmnv/spark,joseph-torres/spark,ahnqirage/spark,stanzhai/spark,shubhamchopra/spark,tejasapatil/spark,aosagie/spark,ueshin/apache-spark,zero323/spark,nchammas/spark,rezasafi/spark,byakuinss/spark,jiangxb1987/spark,skonto/spark,dongjoon-hyun/spark,actuaryzhang/spark,LantaoJin/spark,ioana-delaney/spark,LantaoJin/spark,zhouyejoe/spark,ajaysaini725/spark,someorz/spark,taroplus/spark,JerryLead/spark,guoxiaolongzte/spark,minixalpha/spark,michalsenkyr/spark,shuangshuangwang/spark,guoxiaolongzte/spark,hvanhovell/spark,jlopezmalla/spark,taroplus/spark,jianran/spark,spark-test/spark,bOOm-X/spark,gengliangwang/spark,poffuomo/spark,joseph-torres/spark,HyukjinKwon/spark,rekhajoshm/spark,actuaryzhang/spark,sahilTakiar/spark,ioana-delaney/spark,cin/spark,yanboliang/spark,lxsmnv/spark,zero323/spark,kissmetrics/spark,nchammas/spark,WindCanDie/spark,bravo-zhang/spark,mdespriee/spark,panfengfeng/spark,techaddict/spark,pgandhi999/spark,ddna1021/spark,aokolnychyi/spark,witgo/spark,markhamstra/spark,milliman/spark,ConeyLiu/spark,nchammas/spark,ron8hu/spark,BryanCutler/spark,kiszk/spark,wangmiao1981/spark,akopich/spark,markhamstra/spark,nilsgrabbert/spark,rednaxelafx/apache-spark,panfengfeng/spark,guoxiaolongzte/spark,joseph-torres/spark,debugger87/spark,gengliangwang/spark,nilsgrabbert/spark,liutang123/spark,narahari92/spark,shuangshuangwang/spark,aokolnychyi/spark,wzhfy/spark,map222/spark,maropu/spark,adrian-ionescu/apache-spark,pgandhi999/spark,zuotingbing/spark,hvanhovell/spark,loneknightpy/spark,kiszk/spark,ueshin/apache-spark,WindCanDie/spark,aosagie/spark,wangyum/spark,adrian-ionescu/apache-spark,huang1900/spark,gengliangwang/spark,jrshust/spark,zhouyejoe/spark,JerryLead/spark,nlalevee/spark,zzcclp/spark,dhruve/spark,ptkool/spark,narahari92/spark,caneGuy/spark,hhbyyh/spark,spark-test/spark,spark-test/spark,mdespriee/spark,HyukjinKwon/spark,zuotingbing/spark,rezasafi/spark,ioana-delaney/spark,holdenk/spark,patrick-nicholson/spark,WeichenXu123/spark,setjet/spark,lvdongr/spark,adrian-ionescu/apache-spark,jlopezmalla/spark,markhamstra/spark,liyichao/spark,darionyaphet/spark,ddna1021/spark,setjet/spark,zuotingbing/spark,publicRoman/spark,zero323/spark,witgo/spark,tengpeng/spark,yanboliang/spark,ueshin/apache-spark,andrewor14/spark,apache/spark,stanzhai/spark,skonto/spark,witgo/spark,pgandhi999/spark,ConeyLiu/spark,publicRoman/spark,kiszk/spark,loneknightpy/spark,ericvandenbergfb/spark,jkbradley/spark,xuanyuanking/spark,rekhajoshm/spark,jkbradley/spark,jkbradley/spark,tejasapatil/spark,shubhamchopra/spark,cin/spark,brad-kaiser/spark,Aegeaner/spark,rekhajoshm/spark,andrewor14/spark,highfei2011/spark,shubhamchopra/spark,vinodkc/spark,wangmiao1981/spark,maropu/spark,patrick-nicholson/spark,ConeyLiu/spark,saturday-shi/spark,taroplus/spark,wangmiao1981/spark,mike0sv/spark,actuaryzhang/spark,WindCanDie/spark,yanboliang/spark,nilsgrabbert/spark,nilsgrabbert/spark,dhruve/spark,debugger87/spark,sahilTakiar/spark,wzhfy/spark,kissmetrics/spark,sachintyagi22/spark,loneknightpy/spark,ericvandenbergfb/spark,MLnick/spark,tengpeng/spark,ron8hu/spark,narahari92/spark,nchammas/spark,shubhamchopra/spark,rekhajoshm/spark,kevinyu98/spark,bravo-zhang/spark,yanboliang/spark,JerryLead/spark,eyalfa/spark,ptkool/spark,ioana-delaney/spark,esi-mineset/spark,jianran/spark,actuaryzhang/spark,sachintyagi22/spark,brad-kaiser/spark,apache/spark,wzhfy/spark,lxsmnv/spark,xflin/spark,liutang123/spark,bravo-zhang/spark,ajaysaini725/spark,saltstar/spark,matthewfranglen/spark,shuangshuangwang/spark,cin/spark,chuckchen/spark,guoxiaolongzte/spark,saltstar/spark,jiangxb1987/spark,dbtsai/spark,lxsmnv/spark,poffuomo/spark,MLnick/spark,kissmetrics/spark,techaddict/spark,xflin/spark,rezasafi/spark,saltstar/spark,narahari92/spark,mike0sv/spark,lvdongr/spark,mzl9039/spark,ueshin/apache-spark,eyalfa/spark,ron8hu/spark,byakuinss/spark,zuotingbing/spark,wzhfy/spark,chuckchen/spark,kevinyu98/spark,gengliangwang/spark,tejasapatil/spark,facaiy/spark,ptkool/spark,highfei2011/spark,mdespriee/spark,liyichao/spark,icexelloss/spark,apache/spark,vinodkc/spark,setjet/spark,MLnick/spark,apache/spark,SHASHANKB/spark,wangyum/spark,JerryLead/spark,aray/spark,ahnqirage/spark,srowen/spark,apache-spark-on-k8s/spark,esi-mineset/spark,vinodkc/spark,akopich/spark,taroplus/spark,narahari92/spark,sahilTakiar/spark,JoshRosen/spark,akopich/spark,minixalpha/spark,huang1900/spark,jiangxb1987/spark,eyalfa/spark,techaddict/spark,apache-spark-on-k8s/spark,WindCanDie/spark,goldmedal/spark,darionyaphet/spark,janewangfb/spark,szhem/spark,holdenk/spark,chuckchen/spark,ioana-delaney/spark,mzl9039/spark,aokolnychyi/spark,michalsenkyr/spark,ahnqirage/spark,WeichenXu123/spark,LantaoJin/spark,taroplus/spark,maropu/spark