Update index.html

index.html

@@ -469,7 +469,7 @@ <h2>Exposing change of MediaStreamTrack configuration</h2>
             according <var>track</var>'s underlying source.</p>
         </li>
         <li>
-          <p>[=Fire an event=] named <var>configurationchanged</var> on <var>track</var>.</p>
+          <p>[=Fire an event=] named <var>configurationchange</var> on <var>track</var>.</p>
         </li>
       </ol>
     </p>