Add 1.3 release notes (#482)

* address cve issues

Signed-off-by: Eric <menwe@amazon.com>

* address slowdown CVE

Signed-off-by: Eric <menwe@amazon.com>

* revert showdown

Signed-off-by: Eric <menwe@amazon.com>

* attempt to fix version incompatible for commander

Signed-off-by: Eric <menwe@amazon.com>

* add 1.3.20 elese notes

Signed-off-by: Eric <menwe@amazon.com>

* remove duplicate dompurify

Signed-off-by: Eric <menwe@amazon.com>

---------

Signed-off-by: Eric <menwe@amazon.com>

release-notes/opensearch-dashboards-reports.release-notes-1.3.20.0.md

@@ -0,0 +1,11 @@
+## Version 1.3.20.0 Release Notes
+
+Compatible with OpenSearch 1.3.20
+
+### Bug Fixes
+* Bump dependencies to fix cve ([#479](https://github.com/opensearch-project/dashboards-reporting/pull/479))
+* Bump dependencies to fix cve ([#409](https://github.com/opensearch-project/dashboards-reporting/pull/409))
+
+### Maintenance
+* Increment version to 1.3.20.0 ([#467](https://github.com/opensearch-project/dashboards-reporting/pull/467))
+* Remove dco and update artifact action to v4 ([#475](https://github.com/opensearch-project/dashboards-reporting/pull/475))