Removed explicit copyright end year from LICENSE

Constantly having to keep this year updated to the present year seems to simply be a long-standing norm
in the open source community, rather than something that's legally required.

This was inspired by tox-dev/tox#2941, which also links to a couple other "testimonies":
* https://daniel.haxx.se/blog/2023/01/08/copyright-without-years/
* https://hynek.me/til/copyright-years/

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2017-2023 MAKE NTNU
+Copyright (c) 2017-present, MAKE NTNU
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal