message: update controlled component render code docs
diff: @@ -335,7 +335,7 @@ function App() {
  control={control}
  defaultValue={false}
  rules={{ required: true }}
  - render=(props => <Checkbox {...props} />) // props contains: onChange, onBlur and value
  + render={props => <Checkbox {...props} />} // props contains: onChange, onBlur and value
  />
  </form>
  );
  @@ -368,7 +368,7 @@ function App() {
  control={control}
  defaultValue={false}
  rules={{ required: true }}
  - render=(props => <Checkbox {...props} />) // props contains: onChange, onBlur and value
  + render={props => <Checkbox {...props} />} // props contains: onChange, onBlur and value
  />
  </form>
  );
  