Change openstack-dev to openstack-discuss

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

Change-Id: Ic7a40b79be17fd64de1b87dc9deb58af21facb91
diff --git a/setup.cfg b/setup.cfg
index 8e50a27..8e4d603 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -4,7 +4,7 @@
 description-file =
     README.rst
 author = OpenStack
-author-email = openstack-dev@lists.openstack.org
+author-email = openstack-discuss@lists.openstack.org
 home-page = https://docs.openstack.org/manila/latest/
 classifier =
     Environment :: OpenStack