[neon-notifications] Dev Required: appstream - 0.16.3

[Neon CI]

https://build.neon.kde.org/job/watcher_release_backports-jammy_appstream-jammy2/436/display/redirect

#<Debian::UScan::DEHS::Package:0x000055cb2242e530 @name="appstream", @debian_uversion="0.16.2", @debian_mangled_uversion="0.16.2", @upstream_version="0.16.3", @upstream_url="https://www.freedesktop.org/software/appstream/releases/AppStream-0.16.3.tar.xz", @status="Newer version available">