Add release notes for 1.3.4.0 (#393) (#394)

Signed-off-by: Joshua Li <[email protected]>
(cherry picked from commit 8e01eaa)

Co-authored-by: Joshua Li <[email protected]>

Author: opensearch-trigger-bot[bot]

release-notes/opensearch-dashboards-reports.release-notes-1.3.4.0.md

@@ -0,0 +1,9 @@
+## Version 1.3.4.0 Release Notes
+
+Compatible with OpenSearch and OpenSearch Dashboards Version 1.3.4
+
+### Bug Fixes
+* [1.3] Move HTML sanitization from client to server side (#382) ([#386](https://github.com/opensearch-project/dashboards-reports/pull/386))
+
+### Maintenance
+* Incremented version to 1.3.4. ([#389](https://github.com/opensearch-project/dashboards-reports/pull/389))