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

Change-Id: I777edb39899b58739da904838d72344f95161a49
diff --git a/README.rst b/README.rst
index f2b51a7..b2c74ee 100644
--- a/README.rst
+++ b/README.rst
@@ -22,7 +22,7 @@
 
 * Free software: Apache license
 * Documentation: https://docs.openstack.org/octavia-tempest-plugin/latest/
-* Source: https://git.openstack.org/cgit/openstack/octavia-tempest-plugin
+* Source: https://opendev.org/openstack/octavia-tempest-plugin
 * Bugs: https://storyboard.openstack.org/#!/project/openstack/octavia-tempest-plugin
 
 Installing