added release notes for 2.15.0 (#337)

Signed-off-by: sumukhswamy <sumukhhs@amazon.com>
(cherry picked from commit e22d6b4)
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

release-notes/opensearch-query-workbench.release-notes-2.15.0.0.md

@@ -0,0 +1,12 @@
+## Version 2.15.0.0 Release Notes
+
+Compatible with OpenSearch and OpenSearch Dashboards 2.15.0
+
+### Bug Fixes
+
+- added fix for runAsync query without mds id ([#323](https://github.com/opensearch-project/dashboards-query-workbench/pull/323))
+
+
+### Maintenance
+
+- Updating security reachout email ([324](https://github.com/opensearch-project/dashboards-query-workbench/pull/324))