Add Release Notes for v2.12.0

[ansjcy]

Is your feature request related to a problem? Please provide an existing Issue # , or describe. Add release notes for 2.12 release

Describe the solution you are proposing A clear and concise description of what you want to happen.

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context Add any other context or screenshots about the feature request here.

Check List

• [ ] Backport Labels added.
• [ ] 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

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (6c4400d) 69.25% compared to head (5103fff) 69.40%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #628 +/- ## ============================================ + Coverage 69.25% 69.40% +0.14% - Complexity 371 372 +1 ============================================ Files 44 44 Lines 2706 2706 Branches 172 172 ============================================ + Hits 1874 1878 +4 + Misses 728 725 -3 + Partials 104 103 -1 ```

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