[neon-notifications] Dev Required: vector-blf - 2.4.2

[Neon CI]

https://build.neon.kde.org/job/watcher_release_neon-packaging_vector-blf/391/display/redirect

#<Debian::UScan::DEHS::Package:0x0000563f5f0a25e0 @name="vector-blf", @debian_uversion="2.3.1", @debian_mangled_uversion="2.3.1", @upstream_version="2.4.2", @upstream_url="https://github.com/Technica-Engineering/vector_blf/archive/refs/tags/v2.4.2.tar.gz", @status="Newer version available">