Adding release notes for 1.2.2

[saratvemulapalli]

Signed-off-by: Sarat Vemulapalli vemulapallisarat@gmail.com

Description

Adding release notes for 1.2.2

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

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[opensearch-ci-bot]

Can one of the admins verify this patch?

[saratvemulapalli]

opensearch-project/opensearch-build#1333

[opensearch-ci-bot]

❌   Gradle Check failure f5c3662
Log 1497

Reports 1497

[saratvemulapalli]

Gradle checking failing because 1.2.2 is not added to main.
PR: #1731

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':distribution:bwc:bugfix:buildBwcLinuxTar'.
> Building 1.2.1 didn't generate expected file /var/CITOOL/workflow/OpenSearch_CI/PR_Checks/Gradle_Check/search/distribution/bwc/bugfix/build/bwc/checkout-1.2/distribution/archives/linux-tar/build/distributions/opensearch-min-1.2.1-SNAPSHOT-linux-x64.tar.gz

[andrross]

start gradle check

[opensearch-ci-bot]

✅   Gradle Check success f5c3662
Log 1507

Reports 1507