Update content steering reference stream

samples/advanced/content-steering.html

@@ -249,7 +249,7 @@ <h4>Architecture</h4>
             <div class="col-md-12">
                 <div class="input-group mb-3">
                     <input type="text" id="manifest" class="form-control" placeholder="MPD URL"
-                           value="https://d3pyqdr9jxo6wi.cloudfront.net/bbb/playlist_steering_https.mpd">
+                           value="https://cloudfront.content-steering.com/bbb/playlist_steering_cf_https.mpd">
                     <button type="button" id="load-button" class="btn btn-success">Load MPD
                     </button>
                 </div>