修复了修改task项的bug

src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/impl/TaskServiceImpl.java

@@ -345,6 +345,9 @@ public class TaskServiceImpl extends ServiceImpl<TaskMapper, Task> implements IT
             if (typeChangeValue == 2) {
                 closed = closeTaskAndSubTask(token, task.getTaskProjectId(), task.getTaskId());
             }
+            if (Objects.equals(rawTask, task)) {
+                return task;
+            }
             if (!closed && baseMapper.update(task, Wrappers.<Task>lambdaQuery().eq(Task::getTaskId, task.getTaskId())) == 0) {
                 throw new BadRequestException(BadRequestException.OPERATE_FAILED);
             }