[neon-notifications] Releasing: klettres - 21.08.2

[Neon CI]

https://build.neon.kde.org/job/watcher_release_kde_klettres/16/display/redirect

#<Debian::UScan::DEHS::Package:0x00005593d1f18140 @name="klettres", @debian_uversion="21.08.1", @debian_mangled_uversion="21.08.1", @upstream_version="21.08.2", @upstream_url="http://download.kde.internal.neon.kde.org/stable/release-service/21.08.2/src/klettres-21.08.2.tar.xz", @status="Newer version available">