Add consolidate release notes for 2.0.1 (#2202)

* Add consolidate release notes for 2.0.1

Signed-off-by: Zelin Hao <zelinhao@amazon.com>

* Capitalize the first letter

Signed-off-by: Zelin Hao <zelinhao@amazon.com>

release-notes/opensearch-release-notes-2.0.1.md

@@ -0,0 +1,31 @@
+# OpenSearch and OpenSearch Dashboards 2.0.1 Release Notes
+
+## Release Details
+
+OpenSearch and OpenSearch Dashboards 2.0.1 includes the following bug fixes, documentation, and maintenance updates.
+
+OpenSearch [Release Notes](https://github.com/opensearch-project/OpenSearch/blob/main/release-notes/opensearch.release-notes-2.0.1.md).
+
+OpenSearch Dashboards [Release Notes](https://github.com/opensearch-project/OpenSearch-Dashboards/blob/main/release-notes/opensearch-dashboards.release-notes-2.0.1.md).
+
+## Bug Fixes
+
+### OpenSearch Alerting Dashboards Plugin
+* Implemented a fix for issue 258 which was allowing the UX to define more than 1 index for document level monitors ([#259](https://github.com/opensearch-project/alerting-dashboards-plugin/pull/259))
+* Fixed a bug that was causing the action execution policy to be configurable for query and cluster metrics monitors ([#261](https://github.com/opensearch-project/alerting-dashboards-plugin/pull/261))
+* Fixed an issue preventing doc level monitors from adding execution policy as expected ([#262](https://github.com/opensearch-project/alerting-dashboards-plugin/pull/262))
+* Fixed an issue that would sometimes cause the loadDestinations function to not call getChannels ([#264](https://github.com/opensearch-project/alerting-dashboards-plugin/pull/264))
+
+### Opensearch Anomaly Detection
+* Use current time as training data end time ([#547](https://github.com/opensearch-project/anomaly-detection/pull/547))
+* Bump rcf to 3.0-rc3 ([#568](https://github.com/opensearch-project/anomaly-detection/pull/568))
+
+## Maintenance
+
+### OpenSearch Alerting Dashboards Plugin
+* Incremented version to 2.0.1 ([#269](https://github.com/opensearch-project/alerting-dashboards-plugin/pull/269))
+
+## Documentation
+
+### OpenSearch Alerting Dashboards Plugin
+* Draft release notes for 2.0.1 patch ([#265](https://github.com/opensearch-project/alerting-dashboards-plugin/pull/265))