Update license copyright year(s) (#183)

Co-authored-by: github-actions <[email protected]>
Co-authored-by: Patrick J. Roddy <[email protected]>

LICENCE.txt

@@ -1,6 +1,6 @@
 BSD 3-Clause Licence
 
-Copyright (c) 2021-2024, Patrick J. Roddy
+Copyright (c) 2021-2025, Patrick J. Roddy
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met: