fix scope error

src/features/OnlineExam/Examing/FaceTracking.vue

@@ -319,7 +319,7 @@ export default {
             closable: true,
           });
           this.failTimes = 1;
-          await this.detectTest();
+          await detectTest();
         }
         if (!routeId) return;
         await this.detectFaces();