Merge pull request #25823 from rjain21/patch-3

Update rbac.md

Author: k8s-ci-robot

content/en/docs/reference/access-authn-authz/rbac.md

@@ -514,14 +514,23 @@ subjects:
   namespace: kube-system
 ```
 
-For all service accounts in the "qa" namespace:
+For all service accounts in the "qa" group in any namespace:
 
 ```yaml
 subjects:
 - kind: Group
   name: system:serviceaccounts:qa
   apiGroup: rbac.authorization.k8s.io
 ```
+For all service accounts in the "dev" group in the "development" namespace:
+
+```yaml
+subjects:
+- kind: Group
+  name: system:serviceaccounts:dev
+  apiGroup: rbac.authorization.k8s.io
+  namespace: development
+```
 
 For all service accounts in any namespace: