message: close doc update with watch API with useFieldArray
diff: @@ -925,6 +925,13 @@ React.useEffect(() => {
  validation.
  </p>
  </li>
  + <li>
  + <p>
  + When <code>watch</code> the entire Field Array, it's important to
  + supply a default value with <code>fields</code> to avoid empty
  + values gets returned. eg: <code>watch('fieldArray', fields)</code>
  + </p>
  + </li>
  </ul>
  </>
  ),
  