fix env for staging

.env.staging

@@ -1,4 +1,4 @@
 VUE_APP_TK_SERVER_HTML_URL=http://192.168.10.39:5220
 VUE_APP_TK_SERVER_API_URL=http://192.168.10.39:8008
 VUE_APP_WK_SERVER_SOCKET=wss://ecs-dev.qmth.com.cn:8878/oewebsocket/
-VUE_APP_WK_SERVER_SOCKET_FOR_AUDIO=wss://ecs-dev.qmth.com.cn:8878/oewebsocket/audioAnswer/
+VUE_APP_WK_SERVER_SOCKET_FOR_AUDIO=wss://ecs-dev.qmth.com.cn:8878/oewebsocket/fileAnswer/