stop publishing docs when we tag releases
stop publishing docs when we tag releases

We are simplifying documentation publishing by sticking with release
series and not publishing new docs for every tagged release.

Change-Id: Iec07ba1b4d831044c96048ff483f1b1da0d3da01
Signed-off-by: Doug Hellmann <0798ebecfb7bc4dfb9d0445c2fa030eb64e1fa1c@doughellmann.com>

openstack-infra/project-config,openstack-infra/project-config