Update comments

demos/hello-aframe/index.html

@@ -56,10 +56,10 @@
                 <!-- A 2D overlay displayed in front of the AR scene -->
                 <ar-hud>
 
-                    <!-- The about button -->
+                    <!-- The info button -->
                     <a id="info" href="NOTICE.html" draggable="false"></a>
 
-                    <!-- The sponsor button -->
+                    <!-- The like button -->
                     <a id="like" href="../assets/promo.html" draggable="false"></a>
 
                     <!-- The scan gimmick -->

demos/hello-aframe/video.html

@@ -56,10 +56,10 @@
                 <!-- A 2D overlay displayed in front of the AR scene -->
                 <ar-hud>
 
-                    <!-- The about button -->
+                    <!-- The info button -->
                     <a id="info" href="NOTICE.html" draggable="false"></a>
 
-                    <!-- The sponsor button -->
+                    <!-- The like button -->
                     <a id="like" href="../assets/promo.html" draggable="false"></a>
 
                     <!-- The scan gimmick -->