[neon-notifications] Dev Required: mlt - 7.2.0

[Neon CI]

https://build.neon.kde.org/job/watcher_release_backports-focal_mlt/46/display/redirect

#<Debian::UScan::DEHS::Package:0x000055f8d9884b40 @name="mlt", @debian_uversion="7.0.1", @debian_mangled_uversion="7.0.1", @upstream_version="7.2.0", @upstream_url="https://github.com/mltframework/mlt/archive/refs/tags/v7.2.0.tar.gz", @status="Newer version available">