Update backlight.js

docs/assets/example/backlight.js

@@ -1,10 +1,10 @@
 var url = 'https://zhw2590582.github.io/assets-cdn';
 var art = new Artplayer({
     container: '.artplayer-app',
-    url: url + '/video/ambilight.mp4',
+    url: url + '/video/you-name.mp4',
     autoSize: true,
     moreVideoAttr: {
         crossOrigin: 'anonymous',
     },
     plugins: [artplayerPluginBacklight],
-});
+});