[Branch-1.3] [DOC] doc fix for date
[Branch-1.3] [DOC] doc fix for date

Trivial fix.

Author: Daoyuan Wang <daoyuan.wang@intel.com>

Closes #4400 from adrian-wang/docdate and squashes the following commits:

31bbe40 [Daoyuan Wang] doc fix for date

darionyaphet/spark,ajaysaini725/spark,maropu/spark,map222/spark,ioana-delaney/spark,ddna1021/spark,lxsmnv/spark,big-pegasus/spark,andrewor14/spark,tengpeng/spark,janewangfb/spark,kimoonkim/spark,icexelloss/spark,highfei2011/spark,xuanyuanking/spark,ericvandenbergfb/spark,jlopezmalla/spark,poffuomo/spark,shuangshuangwang/spark,nchammas/spark,ron8hu/spark,shaneknapp/spark,jlopezmalla/spark,darionyaphet/spark,apache-spark-on-k8s/spark,aokolnychyi/spark,liutang123/spark,sureshthalamati/spark,alunarbeach/spark,ron8hu/spark,saltstar/spark,guoxiaolongzte/spark,hvanhovell/spark,tejasapatil/spark,saturday-shi/spark,icexelloss/spark,brad-kaiser/spark,mzl9039/spark,ahnqirage/spark,apache/spark,sureshthalamati/spark,bdrillard/spark,dhruve/spark,taroplus/spark,saltstar/spark,tejasapatil/spark,ajaysaini725/spark,hvanhovell/spark,jrshust/spark,zero323/spark,guoxiaolongzte/spark,ptkool/spark,mdespriee/spark,someorz/spark,publicRoman/spark,nlalevee/spark,michalsenkyr/spark,milliman/spark,WindCanDie/spark,hhbyyh/spark,ConeyLiu/spark,rekhajoshm/spark,map222/spark,poffuomo/spark,andrewor14/spark,jkbradley/spark,goldmedal/spark,pgandhi999/spark,ibm-research-ireland/sparkoscope,byakuinss/spark,bravo-zhang/spark,shaneknapp/spark,bOOm-X/spark,setjet/spark,shuangshuangwang/spark,bOOm-X/spark,jrshust/spark,szhem/spark,esi-mineset/spark,haowu80s/spark,1haodian/spark,taroplus/spark,alunarbeach/spark,jiangxb1987/spark,liyichao/spark,aokolnychyi/spark,ajaysaini725/spark,zzcclp/spark,mdespriee/spark,witgo/spark,milliman/spark,liutang123/spark,SnappyDataInc/spark,ahnqirage/spark,brad-kaiser/spark,holdenk/spark,mahak/spark,mahak/spark,sahilTakiar/spark,adrian-ionescu/apache-spark,minixalpha/spark,wangmiao1981/spark,stanzhai/spark,brad-kaiser/spark,BryanCutler/spark,shuangshuangwang/spark,mike0sv/spark,wzhfy/spark,sureshthalamati/spark,akopich/spark,debugger87/spark,markhamstra/spark,actuaryzhang/spark,ericvandenbergfb/spark,alunarbeach/spark,publicRoman/spark,adrian-ionescu/apache-spark,ahnqirage/spark,huang1900/spark,haowu80s/spark,ajaysaini725/spark,WindCanDie/spark,darionyaphet/spark,gengliangwang/spark,jkbradley/spark,jrshust/spark,wangmiao1981/spark,patrick-nicholson/spark,ioana-delaney/spark,zzcclp/spark,mdespriee/spark,yanboliang/spark,setjet/spark,alunarbeach/spark,jianran/spark,matthewfranglen/spark,ioana-delaney/spark,BryanCutler/spark,apache-spark-on-k8s/spark,jlopezmalla/spark,zzcclp/spark,SHASHANKB/spark,ddna1021/spark,brad-kaiser/spark,gioenn/xSpark,shaneknapp/spark,wangmiao1981/spark,BryanCutler/spark,cin/spark,zhouyejoe/spark,ron8hu/spark,MLnick/spark,stanzhai/spark,saturday-shi/spark,esi-mineset/spark,zero323/spark,shubhamchopra/spark,nilsgrabbert/spark,someorz/spark,aray/spark,jianran/spark,mike0sv/spark,pgandhi999/spark,shaneknapp/spark,1haodian/spark,metamx/spark,jiangxb1987/spark,michalsenkyr/spark,publicRoman/spark,huang1900/spark,JoshRosen/spark,andrewor14/iolap,ahnqirage/spark,techaddict/spark,UndeadBaneGitHub/spark,eyalfa/spark,panfengfeng/spark,shubhamchopra/spark,yanboliang/spark,liyichao/spark,publicRoman/spark,hvanhovell/spark,byakuinss/spark,chuckchen/spark,goldmedal/spark,zuotingbing/spark,tengpeng/spark,aokolnychyi/spark,gengliangwang/spark,witgo/spark,goldmedal/spark,huang1900/spark,ahnqirage/spark,hhbyyh/spark,jkbradley/spark,shuangshuangwang/spark,minixalpha/spark,nlalevee/spark,zhouyejoe/spark,zhouyejoe/spark,wangmiao1981/spark,saturday-shi/spark,esi-mineset/spark,liyichao/spark,WeichenXu123/spark,lvdongr/spark,chuckchen/spark,mike0sv/spark,mzl9039/spark,jrshust/spark,big-pegasus/spark,Aegeaner/spark,WindCanDie/spark,minixalpha/spark,skonto/spark,srowen/spark,aosagie/spark,skonto/spark,saturday-shi/spark,andrewor14/iolap,sachintyagi22/spark,ddna1021/spark,WeichenXu123/spark,jiangxb1987/spark,rezasafi/spark,alunarbeach/spark,kimoonkim/spark,hhbyyh/spark,LantaoJin/spark,minixalpha/spark,saturday-shi/spark,akopich/spark,MLnick/spark,techaddict/spark,someorz/spark,liutang123/spark,adrian-ionescu/apache-spark,skonto/spark,debugger87/spark,rekhajoshm/spark,kevinyu98/spark,BryanCutler/spark,1haodian/spark,kimoonkim/spark,goldmedal/spark,zero323/spark,michalsenkyr/spark,aray/spark,nilsgrabbert/spark,1haodian/spark,rednaxelafx/apache-spark,kimoonkim/spark,wangmiao1981/spark,rednaxelafx/apache-spark,maropu/spark,tejasapatil/spark,nchammas/spark,apache-spark-on-k8s/spark,xflin/spark,kevinyu98/spark,ron8hu/spark,xflin/spark,liutang123/spark,poffuomo/spark,HyukjinKwon/spark,shaneknapp/spark,UndeadBaneGitHub/spark,bOOm-X/spark,highfei2011/spark,caneGuy/spark,vinodkc/spark,zhouyejoe/spark,xflin/spark,sachintyagi22/spark,cin/spark,LantaoJin/spark,brad-kaiser/spark,aokolnychyi/spark,pgandhi999/spark,MLnick/spark,huang1900/spark,WeichenXu123/spark,kiszk/spark,huang1900/spark,andrewor14/iolap,actuaryzhang/spark,holdenk/spark,aray/spark,goldmedal/spark,bOOm-X/spark,jianran/spark,shuangshuangwang/spark,liutang123/spark,metamx/spark,someorz/spark,nilsgrabbert/spark,mdespriee/spark,holdenk/spark,JerryLead/spark,hhbyyh/spark,fa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Xu123/spark,loneknightpy/spark,dongjoon-hyun/spark,caneGuy/spark,lxsmnv/spark,apache/spark,dbtsai/spark,ueshin/apache-spark,techaddict/spark,szhem/spark,SHASHANKB/spark,witgo/spark,techaddict/spark,tengpeng/spark,patrick-nicholson/spark,BryanCutler/spark,WindCanDie/spark,ericvandenbergfb/spark,narahari92/spark,kissmetrics/spark,zuotingbing/spark,yanboliang/spark,sachintyagi22/spark,JoshRosen/spark,shubhamchopra/spark,mzl9039/spark,JerryLead/spark,aray/spark,BryanCutler/spark,pronix/spark,xflin/spark,sachintyagi22/spark,highfei2011/spark,bravo-zhang/spark,setjet/spark,kimoonkim/spark,ioana-delaney/spark,caneGuy/spark,sachintyagi22/spark,cin/spark,andrewor14/iolap,jlopezmalla/spark,loneknightpy/spark,markhamstra/spark,markhamstra/spark,jianran/spark,gengliangwang/spark,loneknightpy/spark,adrian-ionescu/apache-spark,cin/spark,jianran/spark