[neon-notifications] Dev Required: appstream - 0.16.0

[Neon CI]

https://build.neon.kde.org/job/watcher_release_backports-jammy_appstream-jammy2/184/display/redirect

#<Debian::UScan::DEHS::Package:0x00007f65dc0061c8 @name="appstream", @debian_uversion="0.15.6", @debian_mangled_uversion="0.15.6", @upstream_version="0.16.0", @upstream_url="https://www.freedesktop.org/software/appstream/releases/AppStream-0.16.0.tar.xz", @status="Newer version available">