Updated openstack/openstack
Project: openstack/heat  2dcc0f254c75b8b4d3c86e08a5e0cafc54f2b7dc

Workflow documentation is now in infra-manual

Replace URLs for workflow documentation to appropriate parts of the
OpenStack Project Infrastructure Manual.

Change-Id: I589842db624ca525ec04c6d23fe0b1391fe590d2