docs: update/fix license file date and company name

Signed-off-by: Jan Larwig <jan@larwig.com>

Author: tuunit

LICENSE.md

@@ -186,7 +186,7 @@ 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 [yyyy] [name of copyright owner]
+Copyright 2026 Schwarz Digits Cloud GmbH & Co. KG
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.