修改课件播放没有声音的问题

src/views/exercise-after-class/video-class.tsx

@@ -79,6 +79,8 @@ export default defineComponent({
           item.value.paused = false
           if (item.value.muted) {
             item.value.muted = false
+            videoItem.value.muted(false)
+            videoItem.value.volume(1)
             item.value.videoEle.pause()
           }
         })