update fastForward

packages/artplayer-document/docs/en/Options.md

@@ -1062,7 +1062,7 @@ var art = new Artplayer({
 -   Type: `Boolean`
 -   Default: `false`
 
-Whether to display a fast forward button on the mobile
+Whether to add fast forward function on the mobile, when long press the video
 
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packages/artplayer-document/docs/zh-cn/Options.md

@@ -1063,7 +1063,7 @@ var art = new Artplayer({
 -   类型: `Boolean`
 -   默认: `false`
 
-是否在移动端显示一个快进按钮
+是否在移动端添加长按视频快进功能
 
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