Update invalid link

The links are invalid.
Replace them with the available one.

Change-Id: I244332c9eff84c5f15d7d656f80a24f1267c6218
diff --git a/setup.cfg b/setup.cfg
index 48b502f..f69060c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -5,7 +5,7 @@
     README.rst
 author = OpenStack
 author-email = openstack-discuss@lists.openstack.org
-home-page = http://www.openstack.org/
+home-page = https://www.openstack.org/
 classifier =
     Environment :: OpenStack
     Intended Audience :: Information Technology