Add release notes for Review Bot 3.

Review Request #12143 — Created March 13, 2022 and submitted — Latest diff uploaded

Information

ReviewBot
release-3.0.x

Reviewers

This is a massive release, one of the biggest we've had. The release
notes go over all the new tools, improvements to existing tools,
configuration options, and Docker support.

Built the docs. Checked for bad links, spelling errors, and build errors.

Commits

Files