chore: update Apache-2.0 license copyright placeholder

Replace 'Copyright [yyyy] [name of copyright owner]' with
'Copyright 2026 OpenControlPlane contributors' in LICENSE and LICENSES/Apache-2.0.txt.

Part of openmcp-project/backlog#533

Signed-off-by: René Schünemann (SAP) <rene.schuenemann@sap.com>
On-behalf-of: @SAP rene.schuenemann@sap.com

Author: reshnm

LICENSE

@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright [yyyy] [name of copyright owner]
+   Copyright 2026 OpenControlPlane contributors
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

LICENSES/Apache-2.0.txt

@@ -58,7 +58,7 @@ APPENDIX: How to apply the Apache License to your work.
 
 To apply the Apache License to your work, attach the following boilerplate notice, with the fields enclosed by brackets "[]" replaced with your own identifying information. (Don't include the brackets!)  The text should be enclosed in the appropriate comment syntax for the file format. We also recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier identification within third-party archives.
 
-Copyright [yyyy] [name of copyright owner]
+Copyright 2026 OpenControlPlane contributors
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.