Fix paths for static docs playbook
The path was wrong, fix it.
Jobs need to set the variable ``static_target`` for site to
publish to.
This is a promote job for ``openstack-tox-docs``.
- run: playbooks/project-config/promote.yaml
+ run: playbooks/static-docs/promote.yaml
vars:
download_artifact_job: openstack-tox-docs
roles:
