fix: 修改下获取分组的排序

src/backend/bisheng/database/models/group.py

@@ -63,15 +63,15 @@ def insert_group(cls, group: GroupCreate) -> Group:
     @classmethod
     def get_all_group(cls) -> list[Group]:
         with session_getter() as session:
-            statement = select(Group).order_by(Group.id.desc())
+            statement = select(Group).order_by(Group.update_time.desc())
             return session.exec(statement).all()
 
     @classmethod
     def get_group_by_ids(cls, ids: List[int]) -> list[Group]:
         if not ids:
             raise ValueError('ids is empty')
         with session_getter() as session:
-            statement = select(Group).where(Group.id.in_(ids)).order_by(Group.id.desc())
+            statement = select(Group).where(Group.id.in_(ids)).order_by(Group.update_time.desc())
             return session.exec(statement).all()
 
     @classmethod