docs: note about support for ecs deployment controller

Signed-off-by: Hoang Ngo <adlehoang118@gmail.com>

Author: armistcxy

docs/content/en/docs-v1.0.x/plugins/ecs.md

@@ -171,6 +171,8 @@ deploymentController:
 
 Without this, the plugin cannot create or manage task sets for your service.
 
+> **Note:** Support for the ECS deployment controller (`type: ECS`) is planned for a future version.
+
 
 ## Quick sync