Replace git.openstack.org URLs with opendev.org URLs

Change-Id: Ib3d91d5d7cee2564848436f036ae14edca5fd88a
diff --git a/README.rst b/README.rst
index 0f7ec06..e4e5a10 100644
--- a/README.rst
+++ b/README.rst
@@ -7,7 +7,7 @@
 
 * Free software: Apache license
 * Documentation: https://docs.openstack.org/ironic-tempest-plugin
-* Source: https://git.openstack.org/cgit/openstack/ironic-tempest-plugin
+* Source: https://opendev.org/openstack/ironic-tempest-plugin
 * Bugs: https://storyboard.openstack.org/#!/project/951
 
 .. _Tempest: https://docs.openstack.org/tempest/latest/