Labels info ommitted while inspecting self-defined network

Signed-off-by: lixiaobing10051267 <li.xiaobing1@zte.com.cn>
Upstream-commit: a179b5f518
Component: cli

components/cli/docs/reference/commandline/network_inspect.md

@@ -80,7 +80,8 @@ $ sudo docker network inspect bridge
             "com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
             "com.docker.network.bridge.name": "docker0",
             "com.docker.network.driver.mtu": "1500"
-        }
+        },
+        "Labels": {}
     }
 ]
 ```
@@ -107,7 +108,8 @@ $ docker network inspect simple-network
             ]
         },
         "Containers": {},
-        "Options": {}
+        "Options": {},
+        "Labels": {}
     }
 ]
 ```