DM-55779: Add v30.0.11 release notes

[timj]

Checklist

• ran Jenkins
• ran and inspected package-docs build
• 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 88.94%. Comparing base (d90b589) to head (da6da92).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #580      +/-   ##
==========================================
+ Coverage   88.90%   88.94%   +0.03%     
==========================================
  Files         161      161              
  Lines       22505    22505              
  Branches     2675     2675              
==========================================
+ Hits        20008    20016       +8     
+ Misses       1850     1845       -5     
+ Partials      647      644       -3     

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