fix: 批量更新测试计划后更新时间未修改的bug

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

@@ -85,6 +85,7 @@ public class TestPlanTestCaseService {
 
         TestPlanTestCaseWithBLOBs testPlanTestCase = new TestPlanTestCaseWithBLOBs();
         BeanUtils.copyBean(testPlanTestCase, request);
+        testPlanTestCase.setUpdateTime(System.currentTimeMillis());
         testPlanTestCaseMapper.updateByExampleSelective(
                 testPlanTestCase,
                 testPlanTestCaseExample);