DM-54588: v30.0.6 release notes

[timj]

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.21%. Comparing base (e82abaf) to head (f028e61).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #87   +/-   ##
=======================================
  Coverage   84.21%   84.21%           
=======================================
  Files          19       19           
  Lines        4150     4150           
  Branches      451      451           
=======================================
  Hits         3495     3495           
  Misses        577      577           
  Partials       78       78           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.