Add release notes for 3.5.0 (#1386)

Signed-off-by: opensearch-ci <opensearch-infra@amazon.com>

Author: opensearch-ci-bot

release-notes/opensearch-index-management-dashboards-plugin.release-notes-3.5.0.0.md

@@ -0,0 +1,7 @@
+## Version 3.5.0 Release Notes
+
+Compatible with OpenSearch and OpenSearch Dashboards version 3.5.0
+
+### Bug Fixes
+
+* Fixing CVE-2025-64718 ([#1383](https://github.com/opensearch-project/index-management-dashboards-plugin/pull/1383))