[neon-notifications] Releasing: buho - 4.0.0

[Neon CI]

https://build.neon.kde.org/job/watcher_release_neon-packaging_buho/26/display/redirect

#<Debian::UScan::DEHS::Package:0x00007f5bcd3ac048 @name="buho", @debian_uversion="3.1.0", @debian_mangled_uversion="3.1.0", @upstream_version="4.0.0", @upstream_url="http://download.kde.internal.neon.kde.org/stable/maui/buho/4.0.0/buho-4.0.0.tar.xz", @status="Newer version available">