[neon-notifications] Dev Required: xsimd - 12.1.0

[Neon CI]

https://build.neon.kde.org/job/watcher_release_backports-jammy_xsimd-jammy/297/display/redirect

#<Debian::UScan::DEHS::Package:0x000055c4e33a1508 @name="xsimd", @debian_uversion="11.1.0", @debian_mangled_uversion="11.1.0", @upstream_version="12.1.0", @upstream_url="https://github.com/xtensor-stack/xsimd/archive/refs/tags/12.1.0.tar.gz", @status="Newer version available">