feat: update HLS control example and improve audio/quality track selection logic

docs/assets/example/hls.control.js

@@ -6,7 +6,7 @@
 
 var art = new Artplayer({
     container: '.artplayer-app',
-    url: 'https://test-streams.mux.dev/x36xhzz/x36xhzz.m3u8',
+    url: 'https://playertest.longtailvideo.com/adaptive/elephants_dream_v4/index.m3u8',
     setting: true,
     plugins: [
         artplayerPluginHlsControl({