registry: list rally project

Change-Id: I29ec5693ad1e2c3edd5a8ed2d18a4433e4eee627
diff --git a/doc/source/plugin-registry.rst b/doc/source/plugin-registry.rst
index 428efc4..9bc7ce3 100644
--- a/doc/source/plugin-registry.rst
+++ b/doc/source/plugin-registry.rst
@@ -26,6 +26,8 @@
 +--------------------+-------------------------------------------+--------------------+
 |magnum              |git://git.openstack.org/openstack/magnum   |                    |
 +--------------------+-------------------------------------------+--------------------+
+|rally               |git://git.openstack.org/openstack/rally    |                    |
++--------------------+-------------------------------------------+--------------------+
 |sahara              |git://git.openstack.org/openstack/sahara   |                    |
 +--------------------+-------------------------------------------+--------------------+
 |trove               |git://git.openstack.org/openstack/trove    |                    |