Fixes some links and text on the api-specs.html page.
Fixes some links and text on the api-specs.html page.

Change-Id: I7d415e37e0d0985c01df7e16f0add40a48f61016

openstack/openstack-manuals,openstack/openstack-manuals,saeki-masaki/openstack-manuals,saeki-masaki/openstack-manuals,potsmaster/openstack-manuals,gongysh2004/openstack-manual,AlekhyaMallina-Vedams/openstack-manuals,kairoaraujo/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,Akasurde/openstack-manuals,gongysh2004/openstack-manual,AlekhyaMallina-Vedams/openstack-manuals,potsmaster/openstack-manuals,Akasurde/openstack-manuals,openstack/openstack-manuals,kairoaraujo/openstack-manuals