Merge branch 'clusterrolebinding-v1' into 'master'

Updated K8s ClusterRoleBinding API version

See merge request gitlab-org/gitlab!57100

changelogs/unreleased/clusterrolebinding-v1.yml

+---
+title: Updated documented K8s snippet to undeprecated API
+merge_request: 57100
+author: Raimund Hook (@stingrayza)
+type: other

doc/user/project/clusters/add_remove_clusters.md

@@ -231,7 +231,7 @@ To add a Kubernetes cluster to your project, group, or instance:
            name: gitlab
            namespace: kube-system
          ---
-         apiVersion: rbac.authorization.k8s.io/v1beta1
+         apiVersion: rbac.authorization.k8s.io/v1
          kind: ClusterRoleBinding
          metadata:
            name: gitlab-admin