[neon-notifications] Dev Required: kddockwidgets - 2.2.1

[Neon CI]

https://build.neon.kde.org/job/watcher_release_neon-packaging_kddockwidgets/156/display/redirect

#<Debian::UScan::DEHS::Package:0x00007d413fca98a8 @name="kddockwidgets", @debian_uversion="2.1.0", @debian_mangled_uversion="2.1.0", @upstream_version="2.2.1", @upstream_url="https://github.com/KDAB/KDDockWidgets/archive/refs/tags/v2.2.1.tar.gz", @status="Newer version available">