Add release notes for 3.3.0 (#791)

Signed-off-by: opensearch-ci <[email protected]>
(cherry picked from commit 58254c8)
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

release-notes/opensearch-dashboards-flow-framework.release-notes-3.3.0.0.md

@@ -0,0 +1,6 @@
+## Version 3.3.0 Release Notes
+
+Compatible with OpenSearch and OpenSearch Dashboards version 3.3.0
+
+### Features
+* Support agentic search ([#775](https://github.com/opensearch-project/dashboards-flow-framework/pull/775))