fix: restart ssh socket

https://discourse.ubuntu.com/t/sshd-now-uses-socket-based-activation-ubuntu-22-10-and-later/30189

tests.mk

@@ -93,10 +93,8 @@ endif
 	cat /etc/ssh/sshd_config
 	systemctl daemon-reload
 	systemctl list-unit-files | sort
-	service ssh reload
-	service ssh restart
+	systemctl restart ssh.socket
 	service ssh status
-	cat /etc/init/ssh || true
 	sleep 2
 	journalctl -u ssh -n 1000
 endif