[neon-notifications] kirigami-gallery new version 18.12.1

[Neon CI]

https://build.neon.kde.org/job/watcher_release_extras_kirigami-gallery/9/display/redirect

#<Debian::UScan::DEHS::Package:0x0000556463313f68 @name="kirigami-gallery", @debian_uversion="18.12.0", @debian_mangled_uversion="18.12.0", @upstream_version="18.12.1", @upstream_url="http://download.kde.internal.neon.kde.org/stable/applications/18.12.1/src/kirigami-gallery-18.12.1.tar.xz", @status="Newer version available">