Add zaqar to specs.openstack.org

Zaqar seems to be publishing specs now, so lets add them to the
landing page.

Change-Id: I0fa9cdfea536196d4a7dc7e6c172a0e6481f8058

modules/openstack_project/files/specs/index.html

@@ -154,6 +154,10 @@
         <a href="openstack/heat-specs/">Orchestration
           Specifications (heat)</a>
       </dd>
+      <dd>
+         <a href="openstack/zaqar-specs/">Queue Service
+          Specifications (zaqar)</a>
+      </dd>
       <dd>
         <a href="openstack/ceilometer-specs/">Telemetry Service
           Specifications (ceilometer)</a>