Updated demo css file

index.html

@@ -308,7 +308,7 @@
                             <option value="out_world">Out of this world</option>
                         </select>
                         </div>
-                        <p class = "note">** As of this update, the immersive animation will be automatically be used if the display device is below 800px (mobile devices) regardless if the option value is <span class = "code">false</span></p>
+                        <p class = "note">** As of this update, the immersive animation will automatically be used if the display is below 800px (mobile devices) regardless if the option value is <span class = "code">false</span></p>
                     </div>
                 </div>
                 <div class="sections" id="init">