fix 用餐分析日期倒序

Src/Dlhis.Canteen/Order/Services/Implements/BalanceSummaryService.cs

@@ -45,6 +45,7 @@ public class BalanceSummaryService : IBalanceSummaryService
                 Total = grp.Where(x => x.CostDate == grp.Key).Select(x => x.UserNo).Distinct().Count()
             };
         })
+        .OrderByDescending(x => x.Date)
         .ToPage(request);
 
         return page;