【修改】学生课表请假管理：保存申请时赋值申请时间；

Learun.Framework.Ultimate V7/Learun.Framework.Module/Learun.Application.Module/Learun.Application.TwoDevelopment/EducationalAdministration/StuAttendanceLeave/StuAttendanceLeaveService.cs

@@ -351,6 +351,7 @@ namespace Learun.Application.TwoDevelopment.EducationalAdministration
         {
             try
             {
+                entity.UpdateDate = DateTime.Now;
                 if (!string.IsNullOrEmpty(keyValue))
                 {
                     entity.Modify(keyValue, userInfo);