Add notes about the update to the website

Author: shanyangmie

download.html

@@ -96,6 +96,7 @@ <h3>Download the videos/images/music</h3>
 
  <h3 style="padding-top: 15px;">Download the annotations</h3>
  <div class="row">
+ <p> Update 02/09/2021: Update camera pointing direction. [<a href='https://github.com/google/aistplusplus_api/pull/5'>git pull request</a>] </p>
  <div class="col-12" style="padding:0">
  <div class="col-3">
  <a href="https://storage.cloud.google.com/aist_plusplus_public/20210209/motions.zip">