message: docs(aio): fix image size on homepage
diff: <div class="promo-img-container promo-4">
  <div>
  - <img src="assets/images/home/loved-by-millions.png" alt="angular on the map">
  + <img src="assets/images/home/loved-by-millions.png" alt="angular on the map" width="455" height="228">
  </div>
  </div>
  </div>
  