feat：服务指标调整

mec-web/src/main/java/com/ym/mec/web/controller/VipGroupManageController.java

@@ -92,7 +92,7 @@ public class VipGroupManageController extends BaseController {
                 throw new BizException("课程信息错误");
             }
             if(classGroup.getStudentNum()<3){
-                throw new BizException("班级任务尚未达到3人");
+                throw new BizException("班级人数未达到3人");
             }
         }
         vipGroupService.update(vipGroup);