chore: LICENCE based on current year

{{ cookiecutter.package_name }}/LICENCE

 MIT License
 
-Copyright (c) 2023 {{ cookiecutter.package_author }}
+Copyright (c) {% now 'utc', '%Y' %} {{ cookiecutter.package_author }}
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal