[neon-notifications] kimageformats new version 5.73.0

[Neon CI]

https://build.neon.kde.org/job/watcher_release_kde_kimageformats/875/display/redirect

#<Debian::UScan::DEHS::Package:0x000055fdce98d808 @name="kimageformats", @debian_uversion="5.72.0", @debian_mangled_uversion="5.72.0", @upstream_version="5.73.0", @upstream_url="https://download.kde.internal.neon.kde.org/stable/frameworks/5.73/kimageformats-5.73.0.tar.xz", @status="Newer version available">