Userland: Correction in the the copyright

Change the date in the copyright.

Userland/cut.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2020, Marios Prokopakis <mariosprokopakis@gmail.com>
+ * Copyright (c) 2019-2020, Marios Prokopakis <mariosprokopakis@gmail.com>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without