Merge pull request #29271 from yuswift/update-ssa

update server-side-apply state to stable

Author: k8s-ci-robot

content/en/docs/reference/using-api/server-side-apply.md

@@ -12,7 +12,7 @@ min-kubernetes-server-version: 1.16
 
 <!-- overview -->
 
-{{< feature-state for_k8s_version="v1.16" state="beta" >}}
+{{< feature-state for_k8s_version="v1.22" state="stable" >}}
 
 ## Introduction