message: docs: add small note about submitFocusError
diff: @@ -247,7 +247,9 @@ export default {
  <p>
  <b className={typographyStyles.note}>Note:</b> only registered fields
  with <code>ref</code> will work. Custom <code>register</code> inputs
  - do not apply. eg: <code>{`register('test') // doesn't work`}</code>{" "}
  + do not apply. eg: <code>{`register('test') // doesn't work`}</code>{" "}<br/>
  + However you're still able to use `forwardRef` to forward the ref and let
  + the autofocus do its work.
  </p>
  <p>
  