message: Fix example errors
diff: "parameters": {
  "accountEndpoint": "contoso.api.adu.microsoft.com",
  "instanceId": "blue",
  - "groupId": "group1",
  + "groupId": "MyGroup",
  "group": {
  "groupId": "MyGroup",
  "groupType": "IoTHubTag",
  "tags": [
  - "MyAduGroup"
  + "MyGroup"
  ],
  "createdDateTime": "2020-07-01T12:13:14.0000000Z"
  }
  "groupId": "MyGroup",
  "groupType": "IoTHubTag",
  "tags": [
  - "MyAduGroup"
  + "MyGroup"
  ],
  "createdDateTime": "2020-07-01T12:13:14.0000000Z"
  }
  