Update desktop-appimage.vtl

Author: fvarrui

src/main/resources/linux/desktop-appimage.vtl

@@ -5,7 +5,7 @@ GenericName=${info.displayName}
 Comment=${info.description}
 #end
 Exec=${info.name} %U
-Icon=/usr/bin/${info.name}
+Icon=${info.name}
 Terminal=false
 Type=Application
 StartupNotify=true