[neon-notifications] Dev Required: pipewire - 0.3.39

[Neon CI]

https://build.neon.kde.org/job/watcher_release_backports-focal_pipewire/29/display/redirect

#<Debian::UScan::DEHS::Package:0x0000557853304500 @name="pipewire", @debian_uversion="0.3.38", @debian_mangled_uversion="0.3.38", @upstream_version="0.3.39", @upstream_url="https://github.com/PipeWire/pipewire/archive/refs/tags/0.3.39.tar.gz", @status="Newer version available">