Optimize the link address in docs
Optimize the link address in docs

Change-Id: I45a60faa253f5890d15604dd04b40a16fd01d001

stackforge/networking-bagpipe-l2,openstack/networking-bagpipe,openstack/networking-bagpipe-l2,openstack/networking-bagpipe,openstack/networking-bagpipe-l2,stackforge/networking-bagpipe-l2