After upgrading to openssh-9.8p1, the existing SSH daemon will be unable to accept new connections (see https://gitlab.archlinux.org/archlinux/packaging/packages/openssh/-/issues/5).
When upgrading remote hosts, please make sure to restart the sshd service
using systemctl try-restart sshd right after upgrading.
We are evaluating the possibility to automatically apply a restart of the sshd service on upgrade in a future release of the openssh-9.8p1 package.