fix: 修复工单审计员切换其他资产，原资产未删除问题 (#11512)

Co-authored-by: feng <1304903146@qq.com>

apps/tickets/api/ticket.py

@@ -86,7 +86,7 @@ def approve(self, request, *args, **kwargs):
         serializer = self.get_serializer(instance, data=request.data, partial=partial)
         with tmp_to_root_org():
             serializer.is_valid(raise_exception=True)
-        instance = serializer.save()
+            instance = serializer.save()
         instance.approve(processor=request.user)
         return Response('ok')