Update rename-data-source.md

Please verify if the "rename datasource" feature is available in GCC, GCC-H and DoD clouds and update the code change to reference the facts. Note: a lot of microsoft documentation online for power platform doesn't always state if the feature is available in the GCC, GCC-H, and DOD cloud environments.

Author: carlosandrews

powerapps-docs/maker/canvas-apps/rename-data-source.md

@@ -63,6 +63,9 @@ new data source will be named “NewConnector”. Your formulas will still refer
 
 ## Fixing broken formula references to data source names
 
+### Note for users in Microsoft DoD Cloud and maybe GCC, GCC-H Clouds
+This feature is not available.
+
 Using the new “Rename” feature, you can rename your action-based connectors and
 fix up your formulas automatically.