update docs

packages/artplayer-document/docs/en/Plugins/ads.mdx

@@ -68,6 +68,9 @@ var art = new Artplayer({
             // The total duration of the ad, in seconds
             totalDuration: 10,
 
+            // Whether the video ads defaults to silence
+            muted: false,
+
             // Multilingual support
             i18n: {
                 close: 'Close Ads',

packages/artplayer-document/docs/zh-cn/Plugins/ads.mdx

@@ -68,6 +68,9 @@ var art = new Artplayer({
             // 广告总时长，单位为秒
             totalDuration: 10,
 
+            // 视频广告是否默认静音
+            muted: false,
+
             // 多语言支持
             i18n: {
                 close: '关闭广告',