Update AUTHORS

Author: tux-linux

AUTHORS

@@ -1,5 +1,5 @@
 InkBox : Nicolas Mailloux (GitHub:tux-linux)
-epub2txt : GitHub:kevinboone
 Lightmaps/Scribble : Qt Software Foundation
 Icons : feathericons.com
 Dark mode : Kobo Nightmode hack (https://github.com/gtalusan/kobo-nightmode)
+ePUB engine : mutool (MuPDF) - Artifex Software