[neon-notifications] Dev Required: sip6 - 6.11.1

[Neon CI]

https://build.neon.kde.org/job/watcher_release_forks_sip6/285/display/redirect

#<Debian::UScan::DEHS::Package:0x00007c82b2eaf8b0 @name="sip6", @debian_uversion="6.10.0", @debian_mangled_uversion="6.10.0", @upstream_version="6.11.1", @upstream_url="https://github.com/Python-SIP/sip/archive/refs/tags/6.11.1.tar.gz", @status="Newer version available">