update LICENSE.

Signed-off-by: sunfishfly <sunhuaifeng@sdu.edu.cn>

LICENSE

@@ -1,7 +1,8 @@
                     GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 
- Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Copyright (C) 2025 LEEE Group at Shandong University. <https://faculty.sdu.edu.cn/sun>
+
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.