[neon-notifications] Releasing: kscreenlocker - 6.0.4

[Neon CI]

https://build.neon.kde.org/job/watcher_release_kde_kscreenlocker/973/display/redirect

#<Debian::UScan::DEHS::Package:0x0000564d51b50898 @name="kscreenlocker", @debian_uversion="6.0.3", @debian_mangled_uversion="6.0.3", @upstream_version="6.0.4", @upstream_url="https://download.kde.internal.neon.kde.org/stable/plasma/6.0.4/kscreenlocker-6.0.4.tar.xz", @status="Newer version available">