Fix castellan-ui release job
Since castellan-ui is a horizon plugin, it
should use 'publish-to-pypi-horizon' instead
of 'publish-to-pypi' as one of its templates.
- openstack-python35-jobs-horizon
- publish-openstack-sphinx-docs
- check-requirements
- - publish-to-pypi
+ - publish-to-pypi-horizon
- project:
name: openstack/cathead
