Update motd playbook variable

templates/base-role/etc/update-motd.d/motd.sh.j2

@@ -13,5 +13,5 @@ EOF
 
 echo "! ! !"
 echo "! Deployed with Ansible on {{ template_run_date.strftime('%Y-%m-%d %H:%M') }}."
-echo "! Playbook: {{ motd_playbook_url }}"
+echo "! Playbook: {{ base_motd_playbook_url }}"
 echo "! ! !"