[neon-notifications] krita new version 4.2.6

[Neon CI]

https://build.neon.kde.org/job/watcher_release_extras_krita/820/display/redirect

#<Debian::UScan::DEHS::Package:0x000055d73efb5930 @name="krita", @debian_uversion="4.2.5", @debian_mangled_uversion="4.2.5", @upstream_version="4.2.6", @upstream_url="http://download.kde.internal.neon.kde.org/stable/krita/4.2.6/krita-4.2.6.tar.gz", @status="Newer version available">