[neon-notifications] kdenlive new version 18.12.1

[Neon CI]

https://build.neon.kde.org/job/watcher_release_forks_kdenlive/308/display/redirect

#<Debian::UScan::DEHS::Package:0x000055a5309489e8 @name="kdenlive", @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/kdenlive-18.12.1.tar.xz", @status="Newer version available">