Merge pull request kubernetes#5273 from chenhuan12/patch-78

fix typo

Author: chenopis

docs/admin/authorization/rbac.md

@@ -682,6 +682,7 @@ In order from most secure to least secure, the approaches are:
    NOTE: Permissions given to the "default" service account are available to any pod in the namespace that does not specify a `serviceAccountName`.
 
    For example, grant read-only permission within "my-namespace" to the "default" service account:
+   
    ```shell
    kubectl create rolebinding default-view \
      --clusterrole=view \