* Update README to remove IRC reference

The README references IRC (Freenode) as a means of communication regarding the Vault project, but it seems that:

1. Freenode has had its share of issues (https://en.wikipedia.org/wiki/Freenode#Ownership_change_and_conflict)
2. You now need a Freenode account to access their IRC server
3. The channel hasn't been very active (and to the best of my knowledge hasn't been migrated to Libera where a lot of Freenode based projects moved to)

I'd recommend just removing the reference for now, and if things change or another means of collaboration surfaces - adding that later.

* Added changelog file 13031.txt

* Moved required changelog file to the correct folder

* Removed changelog entry based on PR feedback