Add release notes for Review Board 5.0.4.
Review Request #12927 — Created March 27, 2023 and submitted — Latest diff uploaded
This release fixes a number of compatibility issues with other services,
fixes regressions from prior releases, and renames a couple of new APIs
(which impacts compatibility with newer scripts).
It also fixes a handful of other bugs with the diff viewer, SSO, and
other parts of the product.
Built the docs. Checked for build errors, spelling errors, and bad links.