Add log message in release.py (#8461)
Add log message in release.py (#8461)

When building a release candidate with release.py, if it's not the first RC, we need to drop the previous RC's artifacts from the staging repository before closing the new ones. This adds a log message to remind the release manager of this
TiVo/kafka,lindong28/kafka,sslavic/kafka,sslavic/kafka,Chasego/kafka,TiVo/kafka,apache/kafka,apache/kafka,guozhangwang/kafka,guozhangwang/kafka,TiVo/kafka,guozhangwang/kafka,lindong28/kafka,apache/kafka,lindong28/kafka,Chasego/kafka,TiVo/kafka,Chasego/kafka,lindong28/kafka,guozhangwang/kafka,Chasego/kafka,apache/kafka,sslavic/kafka,sslavic/kafka