Update the "ocata" to "pike" for multinode.html

since the pike is release, the multinode.html should update

Change-Id: I5122477b9209cd483ae682032c1949fa5a5cc985

doc/source/user/quickstart.rst

@@ -391,7 +391,7 @@ installation when developing for master. Since no master images are available
 on docker hub, the docker cache may be used for all-in-one deployments.  When
 deploying multinode, a registry is strongly recommended to serve as a single
 source of images. Reference the
-`Multinode Deployment of Kolla <https://docs.openstack.org/project-deploy-guide/kolla-ansible/ocata/multinode.html>`_
+`Multinode Deployment of Kolla <https://docs.openstack.org/project-deploy-guide/kolla-ansible/pike/multinode.html>`_
 for more information on using a local Docker registry.
 Otherwise, the Docker Hub Image Registry contains all
 images from each of Kolla’s major releases. The latest release tag is 5.0.0 for
@@ -539,7 +539,7 @@ There are two methods of deployment: *all-in-one* and *multinode*.  The
 OpenStack services on a single host. In the *multinode* deployment, OpenStack
 services can be run on specific hosts. This documentation describes deploying
 an *all-in-one* setup. To setup *multinode* see the
-`Multinode Deployment of Kolla <https://docs.openstack.org/project-deploy-guide/kolla-ansible/ocata/multinode.html>`_.
+`Multinode Deployment of Kolla <https://docs.openstack.org/project-deploy-guide/kolla-ansible/pike/multinode.html>`_.
 
 .. note::