[neon-notifications] Releasing: kstars - 3.7.7

[Neon CI]

https://build.neon.kde.org/job/watcher_release_extras_kstars/287/display/redirect

#<Debian::UScan::DEHS::Package:0x00007620013e5f98 @name="kstars", @debian_uversion="3.7.6", @debian_mangled_uversion="3.7.6", @upstream_version="3.7.7", @upstream_url="https://download.kde.internal.neon.kde.org/stable/kstars/3.7.7/kstars-3.7.7.tar.xz", @status="Newer version available">