Added release notes for 2.12.0 (#587) (#590)

* added release notes for common-utils



* update release notes



---------


(cherry picked from commit cd8ea9b)

Signed-off-by: jowg-amazon <[email protected]>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: opensearch-trigger-bot[bot]

release-notes/opensearch-common-utils.release-notes-2.12.0.0.md

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+## Version 2.12.0.0 2023-02-06
+
+Compatible with OpenSearch 2.12.0
+
+### Maintenance
+* Increment version to 2.12.0-SNAPSHOT ([#545](https://github.com/opensearch-project/common-utils/pull/545))
+* Onboard prod jenkins docker image to github actions ([#557](https://github.com/opensearch-project/common-utils/pull/557))
+* Update Gradle to 8.4 ([#560](https://github.com/opensearch-project/common-utils/pull/560))
+* Add Java 11/17/21 matrix for build, test and integration checks ([#561](https://github.com/opensearch-project/common-utils/pull/561))
+* changed all usages of 'admin' as a password to something different ([#581](https://github.com/opensearch-project/common-utils/pull/581))
+* Update dependency com.pinterest:ktlint to 0.47.1 and fix CVE-2023-6378 ([#585](https://github.com/opensearch-project/common-utils/pull/585))
+
+### Enhancement
+* add 'fields' parameter in doc level query object. ([#546](https://github.com/opensearch-project/common-utils/pull/546))
+* add fields param in toxcontent() for doc level query ([#549](https://github.com/opensearch-project/common-utils/pull/549))
+* Add User.isAdminDn to User class ([#547](https://github.com/opensearch-project/common-utils/pull/547))
+
+### Refactor
+* Move get monitor and search monitor action / request / responses to common-utils ([#566](https://github.com/opensearch-project/common-utils/pull/566))
+
+# Features
+* Implemented cross-cluster monitor support ([#584](https://github.com/opensearch-project/common-utils/pull/584))
+
+### Documentation
+* Added 2.12.0.0 release notes ([#585](https://github.com/opensearch-project/common-utils/pull/585))