docs: add missing code block closures in documentation files

packages/artplayer-vitepress/docs/en/advanced/built-in.md

@@ -227,6 +227,7 @@ art.on('ready', () => {
 		art.layers.show = false;
 	}, 1000);
 });
+```
 
 :::warning For `Component Configuration`, please refer to:
 

packages/artplayer-vitepress/docs/en/advanced/event.md

@@ -245,6 +245,7 @@ var art = new Artplayer({
 art.on('click', (event) => {
     console.info('click', event);
 });
+```
 
 ## `error`
 
@@ -722,6 +723,7 @@ var art = new Artplayer({
 art.on('subtitle', (state) => {
     console.log(state);
 });
+```
 
 ## `contextmenu`
 

packages/artplayer-vitepress/docs/en/advanced/global.md

@@ -235,6 +235,7 @@ var art = new Artplayer({
     container: '.artplayer-app',
     url: '/assets/sample/404.mp4',
 });
+```
 
 ## RECONNECT_SLEEP_TIME
 
@@ -478,6 +479,7 @@ var art = new Artplayer({
 
 art.contextmenu.show = true;
 art.setting.show = true;
+```
 
 ## FLIP
 

packages/artplayer-vitepress/docs/en/advanced/property.md

@@ -478,6 +478,7 @@ var art = new Artplayer({
         },
     ],
 });
+```
 
 :::warning Note
 

packages/artplayer-vitepress/docs/en/start/option.md

@@ -494,6 +494,7 @@ var art = new Artplayer({
     url: '/assets/sample/video.mp4',
     fullscreenWeb: true,
 });
+```
 
 ## `subtitleOffset`
 
@@ -885,7 +886,6 @@ Set video subtitles, supported subtitle formats: `vtt`, `srt`, `ass`
 | `name`     | `String` | Subtitle name                              |
 | `url`      | `String` | Subtitle URL                               |
 | `type`     | `String` | Subtitle type, options: `vtt`, `srt`, `ass` |
-
 | `style`     | `Object`   | Subtitle style                            |
 | `encoding`  | `String`   | Subtitle encoding, defaults to `utf-8`              |
 | `escape`    | `Boolean`  | Whether to escape `html` tags, defaults to `true` |