H1 update

Author: DCtheGeek

articles/governance/policy/concepts/policy-for-kubernetes.md

@@ -4,7 +4,7 @@ description: Learn how Azure Policy uses Rego and Open Policy Agent to manage cl
 ms.date: 05/20/2020
 ms.topic: conceptual
 ---
-# Understand Azure Policy for Kubernetes clusters
+# Understand Azure Policy for Kubernetes clusters (preview)
 
 Azure Policy extends [Gatekeeper](https://github.com/open-policy-agent/gatekeeper) v3, an _admission
 controller webhook_ for [Open Policy Agent](https://www.openpolicyagent.org/) (OPA), to apply