Update index.html

Author: Proxieru

index.html

@@ -14,7 +14,7 @@
         </div>
         <script>
             EJS_player = "#game";
-            EJS_core = "nintendo64";
+            EJS_core = "mupen64plus_next";
             EJS_mouse = true;
             EJS_gameName = "Super Mario 64";
             EJS_color = "#ff8800";