chore: update kube-stack-version

Author: stefnestor

docset.yml

@@ -296,7 +296,7 @@ subs:
   intake-apis: https://www.elastic.co/docs/api/doc/observability-serverless/
   models-app: "Trained Models"
   agent-builder: "Elastic Agent Builder"
-  kube-stack-version: 0.9.1
+  kube-stack-version: 0.11.1
   ece-docker-images-8: 8.18.8
   ece-docker-images-9: 9.0.8