Updated from generate-devstack-plugins-list

Change-Id: I121cf87e3c4e26b4a223a3e9b8a028763994ad89
diff --git a/doc/source/plugin-registry.rst b/doc/source/plugin-registry.rst
index 585c91c..bae2afd 100644
--- a/doc/source/plugin-registry.rst
+++ b/doc/source/plugin-registry.rst
@@ -64,6 +64,7 @@
 higgins                                `git://git.openstack.org/openstack/higgins <https://git.openstack.org/cgit/openstack/higgins>`__
 ironic                                 `git://git.openstack.org/openstack/ironic <https://git.openstack.org/cgit/openstack/ironic>`__
 ironic-inspector                       `git://git.openstack.org/openstack/ironic-inspector <https://git.openstack.org/cgit/openstack/ironic-inspector>`__
+ironic-staging-drivers                 `git://git.openstack.org/openstack/ironic-staging-drivers <https://git.openstack.org/cgit/openstack/ironic-staging-drivers>`__
 kingbird                               `git://git.openstack.org/openstack/kingbird <https://git.openstack.org/cgit/openstack/kingbird>`__
 kuryr                                  `git://git.openstack.org/openstack/kuryr <https://git.openstack.org/cgit/openstack/kuryr>`__
 magnum                                 `git://git.openstack.org/openstack/magnum <https://git.openstack.org/cgit/openstack/magnum>`__