[MINOR] Add a note about pip installation test in RC for release vote template
[MINOR] Add a note about pip installation test in RC for release vote template

### What changes were proposed in this pull request?

This PR proposes to add a note about pip installation test in RC for release vote template.

### Why are the changes needed?

To promote PySpark users to test PyPi distribution and pip installation.

### Does this PR introduce _any_ user-facing change?

No. It will be used for release vote.

### How was this patch tested?

N/A

Closes #31527 from HyukjinKwon/minor-update-vote-templ.

Authored-by: HyukjinKwon <2680965ad5aae29275c8fb10150cb10f5554e78b@apache.org>
Signed-off-by: HyukjinKwon <2680965ad5aae29275c8fb10150cb10f5554e78b@apache.org>

witgo/spark,gengliangwang/spark,cloud-fan/spark,dongjoon-hyun/spark,nchammas/spark,HyukjinKwon/spark,holdenk/spark,wangyum/spark,xuanyuanking/spark,JoshRosen/spark,witgo/spark,nchammas/spark,taroplus/spark,jiangxb1987/spark,zzcclp/spark,srowen/spark,apache/spark,BryanCutler/spark,ueshin/apache-spark,cloud-fan/spark,xuanyuanking/spark,zero323/spark,srowen/spark,chuckchen/spark,JoshRosen/spark,dongjoon-hyun/spark,gengliangwang/spark,milliman/spark,WeichenXu123/spark,WeichenXu123/spark,BryanCutler/spark,mahak/spark,apache/spark,apache/spark,vinodkc/spark,holdenk/spark,gengliangwang/spark,witgo/spark,zzcclp/spark,wangyum/spark,hvanhovell/spark,rednaxelafx/apache-spark,HyukjinKwon/spark,ueshin/apache-spark,gengliangwang/spark,chuckchen/spark,jiangxb1987/spark,apache/spark,milliman/spark,rednaxelafx/apache-spark,wangyum/spark,BryanCutler/spark,cloud-fan/spark,srowen/spark,shaneknapp/spark,zzcclp/spark,holdenk/spark,witgo/spark,BryanCutler/spark,rednaxelafx/apache-spark,srowen/spark,JoshRosen/spark,srowen/spark,shaneknapp/spark,cloud-fan/spark,zero323/spark,wangmiao1981/spark,zero323/spark,vinodkc/spark,vinodkc/spark,xuanyuanking/spark,wangyum/spark,dongjoon-hyun/spark,vinodkc/spark,vinodkc/spark,dongjoon-hyun/spark,cloud-fan/spark,taroplus/spark,chuckchen/spark,milliman/spark,witgo/spark,milliman/spark,HyukjinKwon/spark,hvanhovell/spark,taroplus/spark,ueshin/apache-spark,BryanCutler/spark,hvanhovell/spark,maropu/spark,HyukjinKwon/spark,vinodkc/spark,wangmiao1981/spark,hvanhovell/spark,mahak/spark,JoshRosen/spark,xuanyuanking/spark,wangyum/spark,zzcclp/spark,WeichenXu123/spark,cloud-fan/spark,xuanyuanking/spark,nchammas/spark,jiangxb1987/spark,taroplus/spark,holdenk/spark,JoshRosen/spark,BryanCutler/spark,wangmiao1981/spark,gengliangwang/spark,zero323/spark,milliman/spark,shaneknapp/spark,shaneknapp/spark,nchammas/spark,rednaxelafx/apache-spark,gengliangwang/spark,WeichenXu123/spark,hvanhovell/spark,WeichenXu123/spark,ueshin/apache-spark,zero323/spark,gengliangwang/spark,zero323/spark,chuckchen/spark,vinodkc/spark,srowen/spark,holdenk/spark,shaneknapp/spark,mahak/spark,apache/spark,WeichenXu123/spark,cloud-fan/spark,zzcclp/spark,HyukjinKwon/spark,jiangxb1987/spark,holdenk/spark,maropu/spark,maropu/spark,HyukjinKwon/spark,wangyum/spark,chuckchen/spark,wangmiao1981/spark,shaneknapp/spark,shaneknapp/spark,xuanyuanking/spark,hvanhovell/spark,maropu/spark,mahak/spark,wangmiao1981/spark,milliman/spark,HyukjinKwon/spark,dongjoon-hyun/spark,taroplus/spark,BryanCutler/spark,taroplus/spark,nchammas/spark,milliman/spark,srowen/spark,ueshin/apache-spark,maropu/spark,mahak/spark,witgo/spark,taroplus/spark,jiangxb1987/spark,ueshin/apache-spark,apache/spark,chuckchen/spark,dongjoon-hyun/spark,JoshRosen/spark,chuckchen/spark,zzcclp/spark,wangmiao1981/spark,ueshin/apache-spark,wangmiao1981/spark,WeichenXu123/spark,hvanhovell/spark,JoshRosen/spark,jiangxb1987/spark,holdenk/spark,apache/spark,mahak/spark,dongjoon-hyun/spark,witgo/spark,maropu/spark,nchammas/spark,rednaxelafx/apache-spark,zzcclp/spark,mahak/spark,maropu/spark,xuanyuanking/spark,zero323/spark,nchammas/spark,rednaxelafx/apache-spark,jiangxb1987/spark,wangyum/spark,rednaxelafx/apache-spark