[neon-notifications] Releasing: kdiff3 - 1.9.3

[Neon CI]

https://build.neon.kde.org/job/watcher_release_extras_kdiff3/699/display/redirect

#<Debian::UScan::DEHS::Package:0x000055b2e1df7930 @name="kdiff3", @debian_uversion="1.9.2", @debian_mangled_uversion="1.9.2", @upstream_version="1.9.3", @upstream_url="https://download.kde.internal.neon.kde.org/stable/kdiff3/kdiff3-1.9.3.tar.xz", @status="Newer version available">