[neon-notifications] fwupd new version 1.5.6

[Neon CI]

https://build.neon.kde.org/job/watcher_release_backports-focal_fwupd/72/display/redirect

#<Debian::UScan::DEHS::Package:0x000055660d302e38 @name="fwupd", @debian_uversion="1.5.3", @debian_mangled_uversion="1.5.3", @upstream_version="1.5.6", @upstream_url="https://github.com/fwupd/fwupd/archive/1.5.6.tar.gz", @status="Newer version available">