community/slick-greeter: upgrade to 2.0.6

https://github.com/linuxmint/slick-greeter/commits/2.0.6

community/slick-greeter/APKBUILD

 # Contributor: David Demelier <markand@malikania.fr>
 # Maintainer: David Demelier <markand@malikania.fr>
 pkgname=slick-greeter
-pkgver=2.0.5
+pkgver=2.0.6
 pkgrel=0
 pkgdesc="a slick-looking LightDM greeter"
 url="https://github.com/linuxmint/slick-greeter"
@@ -27,5 +27,5 @@ package() {
 }
 
 sha512sums="
-394f226e0bd78b317979dcfb76546af3dc4337104887d88d1688a88e7d3d18f23b915cf861f9254d404f075e12c3aeda87ac2a49a4d6255b9b50cb0d15ac6c7a  slick-greeter-2.0.5.tar.gz
+5b2d2017a73f8d3f08ae8ca3d9957d0d93136f82293c5a891ddd8cb58e80081d7f08966eb4131d9b021f867e5c6e244823245da7cf77704eb723560be2ac3b5e  slick-greeter-2.0.6.tar.gz
 "