[neon-notifications] Dev Required: appstream-glib - 0.8.1

[Neon CI]

https://build.neon.kde.org/job/watcher_release_backports-focal_appstream-glib/404/display/redirect

#<Debian::UScan::DEHS::Package:0x0000563bd7cdd7c8 @name="appstream-glib", @debian_uversion="0.7.18", @debian_mangled_uversion="0.7.18", @upstream_version="0.8.1", @upstream_url="https://people.freedesktop.org/~hughsient/appstream-glib/releases/appstream-glib-0.8.1.tar.xz", @status="Newer version available">