DM-55779: Add v30.0.11 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 37.17%. Comparing base (4ea17f3) to head (890649a).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #116   +/-   ##
=======================================
  Coverage   37.17%   37.17%           
=======================================
  Files          13       13           
  Lines        1326     1326           
  Branches      214      214           
=======================================
  Hits          493      493           
  Misses        812      812           
  Partials       21       21           

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