chore(ecs-service-extensions): Promoting the ecs-service-extensions p…

…ackage to stable (#11431)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/@aws-cdk-containers/ecs-service-extensions/README.md

@@ -2,9 +2,7 @@
 <!--BEGIN STABILITY BANNER-->
 ---
 
-![cdk-constructs: Experimental](https://img.shields.io/badge/cdk--constructs-experimental-important.svg?style=for-the-badge)
-
-> The APIs of higher level constructs in this module are experimental and under active development. They are subject to non-backward compatible changes or removal in any future version. These are not subject to the [Semantic Versioning](https://semver.org/) model and breaking changes will be announced in the release notes. This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.
+![cdk-constructs: Stable](https://img.shields.io/badge/cdk--constructs-stable-success.svg?style=for-the-badge)
 
 ---
 <!--END STABILITY BANNER-->

packages/@aws-cdk-containers/ecs-service-extensions/package.json

@@ -99,6 +99,6 @@
   "awscdkio": {
     "announce": false
   },
-  "maturity": "experimental",
-  "stability": "experimental"
-}
+  "maturity": "stable",
+  "stability": "stable"
+}