Reminder: update reporter.a.o after a release

[Josh Elser]

If you are the release manager for Phoenix, make sure you are adding the 
new release here as a final step: 
https://reporter.apache.org/addrelease.html?phoenix

This is important in that it gives folks (e.g. ASF members and ASF board 
members) insight into the releases we're doing. It looks like the last 
two 4.x releases were not included.

Thanks!

- Josh

PS: if you committed a release to svn.a.o, you get a nasty-gram from 
reporter.a.o to do the above. Please don't ignore it ;)