fix播放器倍速选项

@@ -125,7 +125,7 @@ export default {
       this.player = videojs(
       this.player = videojs(
         'my-player',
         'my-player',
         {
         {
-          playbackRates: [1, 1.25, 1.5, 2, 2.5],
+          playbackRates: [1, 1.5, 2],
           userActions: {
           userActions: {
             // doubleClick: this.myDoubleClickHandler,
             // doubleClick: this.myDoubleClickHandler,
             hotkeys: this.hotkeys
             hotkeys: this.hotkeys