[neon-notifications] Releasing: plasma-settings - 21.06

[Neon CI]

https://build.neon.kde.org/job/watcher_release_mobile_plasma-settings/1/display/redirect

#<Debian::UScan::DEHS::Package:0x0000559a4d38dd48 @name="plasma-settings", @debian_uversion="21.05", @debian_mangled_uversion="21.05", @upstream_version="21.06", @upstream_url="http://download.kde.internal.neon.kde.org/stable/plasma-mobile/21.06/plasma-settings-21.06.tar.xz", @status="Newer version available">