[AUTO] Add release notes for 3.2.0

[opensearch-ci-bot]

Add release notes for 3.2.0

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 31.43%. Comparing base (e88586e) to head (f21ae8d).
⚠️ Report is 1 commits behind head on main.

❌ Your project status has failed because the head coverage (31.43%) is below the target coverage (75.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #805   +/-   ##
=========================================
  Coverage     31.43%   31.43%           
  Complexity      150      150           
=========================================
  Files            34       34           
  Lines          1527     1527           
  Branches        137      137           
=========================================
  Hits            480      480           
  Misses         1010     1010           
  Partials         37       37           

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[gaiksaya]

Hi maintainers,

This is the first time we are trying the automation to create release notes based on the changes/commits that went in since last release (3.1.0) which was on June 24, 2025.
Please review the PR and provide feedback. Please feel free to commit the changes in the PR branch.
More details on the workflow
cc: @rishabh6788