[neon-notifications] Dev Required: libei - 1.6.0

[Neon CI]

https://build.neon.kde.org/job/watcher_release_backports-noble_libei-noble/171/display/redirect

#<Debian::UScan::DEHS::Package:0x00007af0fe092238 @name="libei", @debian_uversion="1.5.0", @debian_mangled_uversion="1.5.0", @upstream_version="1.6.0", @upstream_url="https://gitlab.freedesktop.org/libinput/libei/-/archive/1.6.0/libei-1.6.0.tar.bz2", @status="Newer version available", @component="\n  0.0~git20200512.fbbdf14\n  https://github.com/nemequ/munit.git HEAD\n">