Update (git|review).openstack.org links to opendev

This updates links going to git.openstack.org and review.openstack.org
to go to their respective opendev locations to avoid redirects.

Change-Id: I78e3bb5303718962f591117f9c0ee11f2314b128
Closes-Bug: #1833256
diff --git a/doc/source/index.rst b/doc/source/index.rst
index 1ea1c5d..8f95858 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -23,8 +23,7 @@
 environment and as the basis for much of the OpenStack project's
 functional testing.
 
-The source is available at
-`<https://git.openstack.org/cgit/openstack-dev/devstack>`__.
+The source is available at `<https://opendev.org/openstack/devstack>`__.
 
 .. warning::
 
@@ -73,7 +72,7 @@
 
 .. code-block:: console
 
-   $ git clone https://git.openstack.org/openstack-dev/devstack
+   $ git clone https://opendev.org/openstack/devstack
    $ cd devstack
 
 The ``devstack`` repo contains a script that installs OpenStack and