Add docs

Signed-off-by: Derek Ho <[email protected]>

docs/user/ppl/admin/datasources.rst

@@ -104,6 +104,8 @@ we can remove authorization and other details in case of security disabled domai
         "allowedRoles" : ["all_access"]
     }
 
+  **Name is required and must exist. Connector cannot be modified and will be ignored.**
+
 * Datasource Read GET API("_plugins/_query/_datasources/{{dataSourceName}}" ::
 
     GET https://localhost:9200/_plugins/_query/_datasources/my_prometheus
@@ -125,6 +127,7 @@ Each of the datasource configuration management apis are controlled by following
 * cluster:admin/opensearch/datasources/create [Create POST API]
 * cluster:admin/opensearch/datasources/read   [Get GET API]
 * cluster:admin/opensearch/datasources/update [Update PUT API]
+* cluster:admin/opensearch/datasources/patch [Update PATCH API]
 * cluster:admin/opensearch/datasources/delete [Delete DELETE API]
 
 Only users mapped with roles having above actions are authorized to execute datasource management apis.