[neon-notifications] Dev Required: libaqbanking - 6.4.1

[Neon CI]

https://build.neon.kde.org/job/watcher_release_backports-focal_libaqbanking/105/display/redirect

#<Debian::UScan::DEHS::Package:0x0000555985c1c350 @name="libaqbanking", @debian_uversion="6.4.0", @debian_mangled_uversion="6.4.0", @upstream_version="6.4.1", @upstream_url="https://www.aquamaniac.de/rdm/attachments/download/400/aqbanking-6.4.1.tar.gz", @status="Newer version available", @warnings="Nothing was downloaded before, skipping pgp check">