docs: update copyright for 2025

Author: datamweb

mkdocs.yml

@@ -57,7 +57,7 @@ extra:
 site_url: https://shield.codeigniter.com/
 repo_url: https://github.com/codeigniter4/shield
 edit_uri: edit/develop/docs/
-copyright: Copyright © 2023-2024 CodeIgniter Foundation.
+copyright: Copyright © 2023-2025 CodeIgniter Foundation.
 
 markdown_extensions:
   - pymdownx.superfences