Update copyright text

Author: cola119

LICENSE.txt

@@ -187,7 +187,7 @@ APPENDIX: How to apply the Apache License to your work.
    same "printed page" as the copyright notice for easier
    identification within third-party archives.
 
-Copyright 2021 LINE Corporation
+Copyright 2023 LY Corporation
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.