docs(license): update copyright year(s) (#4432)

Co-authored-by: Daniel Gibbs <me@danielgibbs.co.uk>
Co-authored-by: github-actions <github-actions@github.com>

LICENSE.md

@@ -1,6 +1,6 @@
 # The MIT License (MIT)
 
-Copyright (c) 2012-2023 Daniel Gibbs
+Copyright (c) 2012-2024 Daniel Gibbs
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal