Update copyright year to 2026

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: horgh

LICENSE.txt

@@ -1,7 +1,7 @@
 The MIT License (MIT)
 
 Copyright (c) 2016-2020 kushnir.yb
-Copyright (c) 2020-2025 MaxMind, Inc.
+Copyright (c) 2020-2026 MaxMind, Inc.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal