Workflow documentation links were updated, but the wording doesn't
quite make sense now because the first link includes the second link.
Made adjustments to the text so that it is clear which link to use.
Change-Id: I262e51b9cbdc02f30bae2d39fe9f638179965b96
Replace URLs for workflow documentation to appropriate parts of the
OpenStack Project Infrastructure Manual.
Change-Id: I468ae38021b4b55fea84179abe866ddd9e845fe0