message: update watch with useFieldArray
diff: @@ -940,6 +940,14 @@ React.useEffect(() => {
  values gets returned. eg: <code>watch('fieldArray', fields)</code>
  </p>
  </li>
  + <li>
  + <p>
  + When all inputs get removed from the Field Array,{" "}
  + <code>watch</code> will return <code>defaultValues</code>. You can
  + use <code>fields.length</code> to avoid this behaviour. eg{" "}
  + <code>fields.length ? watch('fieldArray', fields) : []</code>
  + </p>
  + </li>
  </ul>
  </>
  ),
  