Correct two links.

The github project has changed from `openstack-ci` to `openstack-infra`,
but two links in the documentation do not reflect this change.

Change-Id: I9359d1071f33719da39fdefd14deea728b9dbfff
Reviewed-on: https://review.openstack.org/23033
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Approved: James E. Blair <corvus@inaugust.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins
diff --git a/doc/source/launchers.rst b/doc/source/launchers.rst
index 0df068d..b347dc8 100644
--- a/doc/source/launchers.rst
+++ b/doc/source/launchers.rst
@@ -142,4 +142,4 @@
 instead.  The OpenStack project uses the following script to prepare
 the workspace for its integration testing:
 
-  https://github.com/openstack-ci/devstack-gate/blob/master/devstack-vm-gate-wrap.sh
+  https://github.com/openstack-infra/devstack-gate/blob/master/devstack-vm-gate-wrap.sh