[neon-notifications] khelpcenter new version 20.04.1

[Neon CI]

https://build.neon.kde.org/job/watcher_release_kde_khelpcenter/793/display/redirect

#<Debian::UScan::DEHS::Package:0x000056469ff95650 @name="khelpcenter", @debian_uversion="20.04.0", @debian_mangled_uversion="20.04.0", @upstream_version="20.04.1", @upstream_url="http://download.kde.internal.neon.kde.org/stable/release-service/20.04.1/src/khelpcenter-20.04.1.tar.xz", @status="Newer version available">