Updates 2.12 release notes (#1329)

Signed-off-by: Darshit Chanpura <[email protected]>
(cherry picked from commit 3f4f216)

release-notes/opensearch-cross-cluster-replication.release-notes-2.12.0.0.md

@@ -7,3 +7,6 @@ Compatible with OpenSearch 2.12.0
 * Implement getSystemIndexDescriptors to support SystemIndex for replication plugin ([#1290](https://github.com/opensearch-project/cross-cluster-replication/pull/1290))
 * Correct error message including what fields are missing when field are not passed when starting replication ([#1292](https://github.com/opensearch-project/cross-cluster-replication/pull/1292))
 * Ignoring all the final settings to copy from leader to follower as those settings won't be able to apply as those are not updatable ([#1304](https://github.com/opensearch-project/cross-cluster-replication/pull/1304))
+
+## Maintenance
+* Updates integTest behavior to accept the version and set the password accordingly, removes admin:admin references and force HTTP1 policy for local clusters([#1298](https://github.com/opensearch-project/cross-cluster-replication/pull/1298))([#1318](https://github.com/opensearch-project/cross-cluster-replication/pull/1318))