Add 2.19.0 release notes (#392) (#393)

Signed-off-by: Lin Wang <wonglam@amazon.com>
(cherry picked from commit 5167b10)

Co-authored-by: Lin Wang <wonglam@amazon.com>

Author: opensearch-trigger-bot[bot]

release-notes/opensearch-ml-commons-dashboards.release-notes-2.19.0.0.md

@@ -0,0 +1,7 @@
+## Version 2.19.0.0 Release Notes
+
+Compatible with OpenSearch 2.19.0
+
+
+### Maintenance
+* Increment version to 2.19.0.0 ([#387](https://github.com/opensearch-project/ml-commons-dashboards/pull/387))