Add release notes for 2.13 (#6228)

Signed-off-by: Manasvini B Suryanarayana <manasvis@amazon.com>

release-notes/opensearch-dashboards.release-notes-2.13.0.md

@@ -5,6 +5,7 @@
 - Support dynamic CSP rules to mitigate Clickjacking https://github.com/opensearch-project/OpenSearch-Dashboards/pull/5641
 - [CVE-2020-36604] Employ a patched version of hoek `6.1.3` ([#6148](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6148))
 - [CVE-2024-27088] Bump es5-ext from `0.10.59` to `0.10.64` ([#6021](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6021))
+- [CVE-2024-28849] Bump follow-redirect from `1.15.4` to `1.15.6` ([#6199](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6201))
 
 ### 📈 Features/Enhancements
 
@@ -27,6 +28,7 @@
 - [Multiple Datasource] Export DataSourcePluginRequestContext at top level for plugins to use ([#6108](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6108))
 - [Multiple Datasource] Improves connection pooling support for AWSSigV4 clients in data sources ([#6135](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6135))
 - [Multiple Datasource] Add datasource version number to newly created data source object([#6178](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6178))
+- [Multiple Datasource] Allow seting a remote data source as the default for the UI ([#6186](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6186))
 - Implement new home page ([#6065](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6065))
 - Add sidecar service ([#5920](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/5920))
 - [Dynamic Configurations] Pass request headers when making application config calls ([#6164](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6164))