fix(测试跟踪): 测试评审按ID排序报错

--bug=1015012 --user=陈建星 [测试跟踪]用例评审-用例评审列表按照ID排序报sql错误 https://www.tapd.cn/55049933/s/1204781

backend/src/main/java/io/metersphere/base/mapper/ext/ExtTestReviewCaseMapper.xml

@@ -113,7 +113,7 @@
             <foreach collection="request.orders" separator="," item="order">
                 <choose>
                     <when test="order.name == 'custom_num'">
-                        customNum ${order.type}
+                        test_case.custom_num ${order.type}
                     </when>
                     <when test="order.name == 'priority'">
                         test_case.priority ${order.type}