Deploy the website after a release has been successfully promoted
Deploy the website after a release has been successfully promoted

The current behavior will publish to the website with every merge to
master. This can cause confusion with our users as our documentation may
reference features that haven't been released. To correct this, we move
the triggering of the pipeline to be after a successful promotion to
stable.

Signed-off-by: Scott Macfarlane <61ab88da22e66a307c8750ba8405a298806f7634@chef.io>

habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat