[neon-notifications] Dev Required: libquotient - 0.6.8

[Neon CI]

https://build.neon.kde.org/job/watcher_release_neon-packaging_libquotient/255/display/redirect

#<Debian::UScan::DEHS::Package:0x0000555700d89a30 @name="libquotient", @debian_uversion="0.6.7", @debian_mangled_uversion="0.6.7", @upstream_version="0.6.8", @upstream_url="https://github.com/quotient-im/libQuotient/archive/refs/tags/0.6.8.tar.gz", @status="Newer version available">