[neon-notifications] Releasing: spacebar - 21.07

[Neon CI]

https://build.neon.kde.org/job/watcher_release_mobile_spacebar/56/display/redirect

#<Debian::UScan::DEHS::Package:0x0000563d18a5c610 @name="spacebar", @debian_uversion="21.06", @debian_mangled_uversion="21.06", @upstream_version="21.07", @upstream_url="http://download.kde.internal.neon.kde.org/stable/plasma-mobile/21.07/spacebar-21.07.tar.xz", @status="Newer version available">