[neon-notifications] Dev Required: qt6-grpc - 6.11.1

[Neon CI]

https://build.neon.kde.org/job/watcher_release_qt6_qt6-grpc/569/display/redirect

#<Debian::UScan::DEHS::Package:0x0000777c370d4f50 @name="qt6-grpc", @debian_uversion="6.10.2", @debian_mangled_uversion="6.10.2", @upstream_version="6.11.1", @upstream_url="https://mirror.netcologne.de/qtproject/official_releases/qt/6.11/6.11.1/submodules/qtgrpc-everywhere-src-6.11.1.tar.xz", @status="Newer version available">