Add release notes for Review Board 4.0.10.
Review Request #39 — Created Aug. 3, 2022 and updated
This is a re-release of 4.0.8 and 4.0.9. Both those releases had packaging issues. 4.0.8 had a bad dependency and broken merge, and both releases had a packaging issue triggered by changes in Babel. This re-release fixes the remaining known issues. The 4.0.8 and 4.0.9 releases have been officially pulled from PyPI, and the release notes here have been updated to simply point to the 4.0.10 release notes instead. Testing Done: Built the docs. Checked for bad links and build errors. Checked the links from the 4.0.8 and 4.0.9 release notes to 4.0.10. Reviewed at https://reviews.reviewboard.org/r/12491/