Renamed deprecated function name

templates/web_shell/shell.html

@@ -144,7 +144,7 @@
         <div class="emscripten" id="status">Downloading...</div>
 
         <span id='controls'>
-          <span><input type="button" value="Fullscreen" onclick="Module.requestFullScreen(false, false)"></span>
+          <span><input type="button" value="Fullscreen" onclick="Module.requestFullscreen(false, false)"></span>
         </span>
 
         <div class="emscripten">