docs: update readme

Author: m4b

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) m4b 2016-2018
+Copyright (c) m4b 2016-2024
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -260,6 +260,8 @@ In lexicographic order:
 
 ## Contributing
 
+Unless explicitly stated otherwise, you agree that your contributions are licensed as described in the accompanying LICENSE file (MIT).
+
 1. Please prefix commits with the affected binary component; the more specific the better, e.g.,
    if you only modify relocations in the elf module, then do "elf.reloc: added new constants for Z80"
 1. Commit messages must explain their change, no generic "changed", or "fix"; if you push commits