Check the return message of docker service inspect

Signed-off-by: lixiaobing10051267 <li.xiaobing1@zte.com.cn>

docs/swarm/swarm-tutorial/delete-service.md

@@ -33,7 +33,7 @@ removed the service. The CLI returns a message that the service is not found:
     ```
     $ docker service inspect helloworld
     []
-    Error: no such service or task: helloworld
+    Error: no such service: helloworld
     ```
 
 ## What's next?