Change openstack-dev to openstack-discuss

Mailinglists have been updated. Openstack-discuss replaces openstack-dev.

Change-Id: Id703eea7a8106fbdbd906ee82ac021a36f001cd1

setup.cfg

@@ -15,7 +15,7 @@ classifiers =
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX :: Linux
 author = OpenStack
-author-email = openstack-dev@lists.openstack.org
+author-email = openstack-discuss@lists.openstack.org
 home-page = https://docs.openstack.org/mistral/latest/
 
 [global]