added release notes for 2.16 (#1019)

* added release notes for 2.16

Signed-off-by: Riya Saxena <riysaxen@amazon.com>

* added release notes for 2.16

Signed-off-by: Riya Saxena <riysaxen@amazon.com>

---------

Signed-off-by: Riya Saxena <riysaxen@amazon.com>

release-notes/opensearch-alerting-dashboards-plugin.release-notes-2.16.0.0.md

@@ -0,0 +1,18 @@
+## Version 2.16.0.0 2024-07-23
+Compatible with OpenSearch Dashboards 2.16.0
+
+### Maintenance
+* Increment version to 2.16.0.0 ([#1009](https://github.com/opensearch-project/alerting-dashboards-plugin/pull/1009))
+* Increment version to 2.16.0.0 ([#978](https://github.com/opensearch-project/alerting-dashboards-plugin/pull/978))
+
+### Features
+* Plugin Version decoupling for MDS support ([#1003](https://github.com/opensearch-project/alerting-dashboards-plugin/pull/1003))
+* Look & Feel  use standard paragraph size ([#1000](https://github.com/opensearch-project/alerting-dashboards-plugin/pull/1000))
+* Look & Feel Use small EuiTabs across the board ([#1001](https://github.com/opensearch-project/alerting-dashboards-plugin/pull/1001))
+* Look & Feel use semantic header with correct size for page, modal and flyout ([#1002](https://github.com/opensearch-project/alerting-dashboards-plugin/pull/1002))
+* Look & Feel apply missing pattern guidance to Alerting experience ([#1008](https://github.com/opensearch-project/alerting-dashboards-plugin/pull/1008))
+* side nav changes for alerting ([#1007](https://github.com/opensearch-project/alerting-dashboards-plugin/pull/1007))
+* Look & Feel Adjust helper text size across monitor page ([#1012](https://github.com/opensearch-project/alerting-dashboards-plugin/pull/1012))
+
+### Documentation
+* Added v2.16 release notes. ([#1019](https://github.com/opensearch-project/alerting-dashboards-plugin/pull/1019))