Merge pull request #21638 from yongtang/21605-docs-Warnings-in-volumes-API

Update documentations for `Warnings` fields in `GET /volumes` API

docs/reference/api/docker_remote_api_v1.22.md

@@ -2789,7 +2789,8 @@ Status Codes:
           "Driver": "local",
           "Mountpoint": "/var/lib/docker/volumes/tardis"
         }
-      ]
+      ],
+      "Warnings": []
     }
 
 Query Parameters:

docs/reference/api/docker_remote_api_v1.23.md

@@ -2832,7 +2832,8 @@ Status Codes:
           "Driver": "local",
           "Mountpoint": "/var/lib/docker/volumes/tardis"
         }
-      ]
+      ],
+      "Warnings": []
     }
 
 Query Parameters:

docs/reference/api/docker_remote_api_v1.24.md

@@ -2836,7 +2836,8 @@ Status Codes:
           "Driver": "local",
           "Mountpoint": "/var/lib/docker/volumes/tardis"
         }
-      ]
+      ],
+      "Warnings": []
     }
 
 Query Parameters: