fix(测试跟踪): 功能测试用例未按照顺序导出至excel

--bug=1013625 --user=李玉号
[测试跟踪]github#13694功能测试用例导出excel后，无法按照功能测试用例列表顺序导出
https://www.tapd.cn/55049933/s/1176219

Closes #13694

backend/src/main/java/io/metersphere/track/service/TestCaseService.java

@@ -1499,7 +1499,7 @@ public class TestCaseService {
         QueryTestCaseRequest condition = request.getCondition();
         List<OrderRequest> orderList = new ArrayList<>();
         if (condition != null) {
-            orderList = ServiceUtils.getDefaultSortOrder(request.getOrders());
+            orderList = ServiceUtils.getDefaultSortOrder(condition.getOrders());
         }
         OrderRequest order = new OrderRequest();
         order.setName("sort");