Add 2.3.0.0 release notes (opensearch-project#2079) (opensearch-proje…

…ct#2080)

Signed-off-by: Chang Liu <lc12251109@gmail.com>

Signed-off-by: Chang Liu <lc12251109@gmail.com>
(cherry picked from commit 8f7f1b5)

Co-authored-by: Chang Liu <lc12251109@gmail.com>

release-notes/opensearch-security.release-notes-2.3.0.0.md

@@ -0,0 +1,15 @@
+## 2022-08-15 Version 2.3.0.0
+
+Compatible with OpenSearch 2.3.0
+
+### Enhancements
+* Point in time API security changes ([#2033](https://github.com/opensearch-project/security/pull/2033))
+
+### Bug Fixes
+* Triple audit logging fix ([#1996](https://github.com/opensearch-project/security/pull/1996))
+* Add allowlist.yml to 3 places in securityadmin tool ([#2046](https://github.com/opensearch-project/security/pull/2046))
+* Fix legacy check in SecurityAdmin ([#2052](https://github.com/opensearch-project/security/pull/2052))
+
+### Maintenance
+* Increment version to 2.3.0.0 ([#2022](https://github.com/opensearch-project/security/pull/2022))
+* Update Gradle to 7.5.1 ([#2027](https://github.com/opensearch-project/security/pull/2027))