Add release notes for Djblets 2.2.2.
Review Request #11658 — Created June 14, 2021 and submitted — Latest diff uploaded
This is a small bug fix release that fixes an issue parsing Markdown
element trees when e-mail addresses contain invalid characters for XML.
The fix was introduced in 1.0.18.
Built the release notes. Checked for build errors, spelling errors, bad
links.