Add release notes for 3.3.0 (#767)

Signed-off-by: opensearch-ci <opensearch-infra@amazon.com>

Author: opensearch-ci-bot

release-notes/opensearch-asynchronous-search.release-notes-3.3.0.0.md

@@ -0,0 +1,9 @@
+## Version 3.3.0 Release Notes
+
+Compatible with OpenSearch and OpenSearch Dashboards version 3.3.0
+
+### Bug Fixes
+* Fix: Update System.env syntax for Gradle 9 compatibility ([#763](https://github.com/opensearch-project/asynchronous-search/pull/763))
+
+### Maintenance
+* Increment version to 3.3.0-SNAPSHOT ([#761](https://github.com/opensearch-project/asynchronous-search/pull/761))