kmbox: update to 18.04.3.

[ci skip]

srcpkgs/kmbox/template

@@ -1,6 +1,6 @@
 # Template file for 'kmbox'
 pkgname=kmbox
-version=17.12.3
+version=18.04.3
 revision=1
 build_style=cmake
 hostmakedepends="extra-cmake-modules qt5-qmake qt5-host-tools python"
@@ -9,8 +9,8 @@ short_desc="Library for accessing mail storages in MBox format"
 maintainer="John <johnz@posteo.net>"
 license="LGPL-2.1-or-later"
 homepage="https://community.kde.org/KDE_PIM"
-distfiles="https://download.kde.org/stable/applications/${version}/src/kmbox-${version}.tar.xz"
-checksum=f5c95218afe3e3dcc0d708497e0b918578e8d5ad1cde9f875432f3c57863a997
+distfiles="${KDE_SITE}/applications/${version}/src/kmbox-${version}.tar.xz"
+checksum=856719f3b44d1c463ad12e0d271891f06dce5c2654a6945be13a50da5386bad5
 
 kmbox-devel_package() {
 	depends="${sourcepkg}>=${version}_${revision}"