Update README.md (LZK2 -> LZK4)

Author: trebmuh

README.md

@@ -11,7 +11,7 @@ Editor for the TC Electronic G-Major guitar effect module
 
 - [G-Major manual :us: :jp: :it: :de: :es: :fr:](https://www.tcelectronic.com/Categories/Tcelectronic/Guitar/Effects-Processors/G-MAJOR/p/HE066/Downloads)
 - [Linux MAO :fr:](http://linuxmao.org/FreeMajor)
-- [LibraZiK-2 :fr:](http://librazik.tuxfamily.org/doc2/logiciels/freemajor)
+- [LibraZiK-4 :fr:](http://librazik.tuxfamily.org/doc4/logiciels/freemajor)
 
 ### Dependencies