Update 'prep-grid-vm.sh'

prep-grid-vm.sh

@@ -49,7 +49,8 @@ if [ "$major_version" -ge 24 ]; then
   cat > /etc/systemd/system/ssh.socket.d/port.conf <<EOF
 [Socket]
 ListenStream=
-ListenStream=34022
+ListenStream=0.0.0.0:34022
+ListenStream=[::]:34022
 EOF
   systemctl daemon-reload
   systemctl restart ssh.socket