[SPARK-20208][DOCS][FOLLOW-UP] Add FP-Growth to SparkR programming guide
[SPARK-20208][DOCS][FOLLOW-UP] Add FP-Growth to SparkR programming guide

## What changes were proposed in this pull request?

Add `spark.fpGrowth` to SparkR programming guide.

## How was this patch tested?

Manual tests.

Author: zero323 <zero323@users.noreply.github.com>

Closes #17775 from zero323/SPARK-20208-FOLLOW-UP.

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