Bump my copyright and fix GPL text

debian/copyright

@@ -36,10 +36,10 @@ Copyright:
     Copyright (C) 2017, Cyril Brulebois <cyril@debamax.com>
     Copyright (C) 2020, Simone Rossetto <simros85@gmail.com>
     Copyright (C) 2020-2023, Gianfranco Costamagna <locutusofborg@debian.org>
-    Copyright (C) 2023, William Desportes <williamdes@wdes.fr>
+    Copyright (C) 2023-2025, William Desportes <williamdes@wdes.fr>
 License: GPL-2
 
 License: GPL-2
  On Debian systems the full text of the GNU General Public
- License can be found in the `/usr/share/common-licenses/GPL-2'
+ License can be found in the `/usr/share/common-licenses/GPL-2`
  file.