Add the -n for pod in kubectl command (#16798)

Signed-off-by: PingWang <wang.ping5@zte.com.cn>

Add instructions in kubectl command

Signed-off-by: PingWang <wang.ping5@zte.com.cn>

update

Signed-off-by: PingWang <wang.ping5@zte.com.cn>

content/en/docs/contribute/style/style-guide.md

@@ -73,9 +73,9 @@ represents.
 
 1. Display information about a Pod:
 
-        kubectl describe pod <pod-name>
+        kubectl describe pod <pod-name> -n <namespace>
 
-    where `<pod-name>` is the name of one of your Pods.
+    If the namespace of the pod is `default`, you can omit the '-n' parameter.
 
 ### Use bold for user interface elements