updating release note for 2.12.0

[dhrubo-os]

Description

[updating release note for 2.12.0]

Issues Resolved

[List any issues this PR will resolve]

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (d22dbdd) 81.83% compared to head (304f506) 81.83%.
Report is 1 commits behind head on 2.x.

❗ Current head 304f506 differs from pull request most recent head 29051c2. Consider uploading reports for the commit 29051c2 to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x    #2108      +/-   ##
============================================
- Coverage     81.83%   81.83%   -0.01%     
  Complexity     5619     5619              
============================================
  Files           543      543              
  Lines         22819    22819              
  Branches       2339     2339              
============================================
- Hits          18674    18673       -1     
- Misses         3210     3213       +3     
+ Partials        935      933       -2     

Flag	Coverage Δ
ml-commons	81.83% <ø> (-0.01%)	⬇️

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[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-2.x 2.x
# Navigate to the new working tree
cd .worktrees/backport-2.x
# Create a new branch
git switch --create backport/backport-2108-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 024408c3f9be533fa0127ef93702c437088aa947
# Push it to GitHub
git push --set-upstream origin backport/backport-2108-to-2.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-2108-to-2.x.