[neon-notifications] Releasing: kdegraphics-thumbnailers-5 - 26.04.3

[Neon CI]

https://build.neon.kde.org/job/watcher_release_graphics_kdegraphics-thumbnailers-5/208/display/redirect

#<Debian::UScan::DEHS::Package:0x000070b87f228a78 @name="kdegraphics-thumbnailers-5", @debian_uversion="26.04.2", @debian_mangled_uversion="26.04.2", @upstream_version="26.04.3", @upstream_url="http://download.kde.internal.neon.kde.org/stable/release-service/26.04.3/src/kdegraphics-thumbnailers-26.04.3.tar.xz", @status="Newer version available">