[neon-notifications] libgwenhywfar new version 5.6.0

[Neon CI]

https://build.neon.kde.org/job/watcher_release_backports-focal_libgwenhywfar/6/display/redirect

#<Debian::UScan::DEHS::Package:0x0000562fc47a9a28 @name="libgwenhywfar", @debian_uversion="5.5.1", @debian_mangled_uversion="5.5.1", @upstream_version="5.6.0", @upstream_url="https://www.aquamaniac.de/rdm/attachments/download/364/gwenhywfar-5.6.0.tar.gz", @status="Newer version available">