[neon-notifications] Dev Required: qt6-imageformats - 6.7.3

[Neon CI]

https://build.neon.kde.org/job/watcher_release_qt6_qt6-imageformats/53/display/redirect

#<Debian::UScan::DEHS::Package:0x00007f37d193bf10 @name="qt6-imageformats", @debian_uversion="6.7.2", @debian_mangled_uversion="6.7.2", @upstream_version="6.7.3", @upstream_url="https://qt-mirror.dannhauer.de/official_releases/qt/6.7/6.7.3/submodules/qtimageformats-everywhere-src-6.7.3.tar.xz", @status="Newer version available">