Add release notes for Review Board 5.0.5.
Review Request #13117 — Created June 19, 2023 and submitted — Latest diff uploaded
This is a big release, focused on easier virtualenv-based installation
and management, web-based authentication for RBTools 5, fixes for SSO,
and some new usability and management improvements.
Built the docs. Checked for spelling errors, build errors, and bad links.