Update AUTHORS: update authors to better reflect contributions and works

Author: Andy C

AUTHORS

@@ -2,7 +2,7 @@ See a list of contributors here
 ===============================
  Original/Modified work: Copyright (C) 2017-2020 LinxGem33 (Andy C)
  Original/Modified work: Copyright (C) 2019-2020 Andrew Zaech
- ==============================
+===============================
  Original work: Copyright (C) 2015 Giovanni Campagna
  Modified work: Copyright (C) 2016 Zorin OS
  Modified work: Copyright (C) 2017 Alexander Rüedlinger