Update copyright notices to 2024

debian/copyright

@@ -8,7 +8,7 @@ License: Apache-2.0
 
 Files:
  debian/*
-Copyright: 2017-2023 Christoph Biedl <debian.axhn@manchmal.in-ulm.de>
+Copyright: 2017-2024 Christoph Biedl <debian.axhn@manchmal.in-ulm.de>
 License: Apache-2.0
 
 License: Apache-2.0