systemd-nspawn shall be called with option "--register=no" to prevent error after debootstrap
systemd-nspawn shall be called with option "--register=no" to prevent error after debootstrap

After debootstrap the call of "debos" fails with message "Failed to register machine: Unit machine-root.scope already exists".
With the option "--register=no" this works fine. This change is derived from https://gitlab.collabora.com/smcv/flatdeb/-/merge_requests/6

Signed-off-by: mtt2hi <1d31dc090dc4fd1497878d59fa685db46eb3a747@de.bosch.com>

go-debos/debos