adding release notes for 2.14 (#1823) (#1825)

(cherry picked from commit e44cd2e)

Signed-off-by: Shenoy Pratik <sgguruda@amazon.com>
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>

release-notes/opensearch-observability.release-notes-2.14.0.0.md

@@ -0,0 +1,11 @@
+## Version 2.14.0.0 Release Notes
+
+Compatible with OpenSearch 2.14.0
+
+### Maintenance
+
+- Increment version to 2.14.0-SNAPSHOT ([#1813](https://github.com/opensearch-project/observability/pull/1813))
+
+### Enhancements
+
+- Tenancy access control ([#1821]https://github.com/opensearch-project/observability/pull/1821)