fix:修复注释错误

src/Application/TakeoutSaaS.Application/App/Billings/Handlers/ExportBillingsQueryHandler.cs

@@ -24,14 +24,14 @@ public sealed class ExportBillingsQueryHandler(
             throw new BusinessException(ErrorCodes.BadRequest, "账单 ID 列表不能为空");
         }
 
-        // 2. (空行后) 查询账单数据
+        // 2. 查询账单数据
         var billings = await billingRepository.GetByIdsAsync(request.BillingIds, cancellationToken);
         if (billings.Count == 0)
         {
             throw new BusinessException(ErrorCodes.NotFound, "未找到任何匹配的账单");
         }
 
-        // 3. (空行后) 根据格式导出
+        // 3. 根据格式导出
         var format = (request.Format ?? string.Empty).Trim().ToLowerInvariant();
         return format switch
         {