chore: Update artplayer-proxy-canvas to support canvas proxy

docs/assets/example/canvas.js

@@ -3,7 +3,7 @@
 
 var art = new Artplayer({
     container: '.artplayer-app',
-    url: '/assets/sample/frag_bunny.mp4',
+    url: '/assets/sample/video.mp4',
     volume: 0.5,
     autoplay: false,
     autoSize: false,
@@ -18,11 +18,10 @@ var art = new Artplayer({
     miniProgressBar: true,
     autoPlayback: true,
     thumbnails: {
-        url: '/assets/sample/bbb-sprite.jpg',
-        number: 121,
-        column: 11,
-        width: 128,
-        height: 72,
+        url: '/assets/sample/thumbnails.png',
+        number: 60,
+        column: 10,
+        scale: 0.85,
     },
     proxy: artplayerProxyCanvas(),
 });