Update metadata.yml with correct URL

Change-Id: I6e13a2bea56e16796079d4b39de6aaeef35a18c8
diff --git a/metadata.yml b/metadata.yml
index c67081b..aaf139d 100644
--- a/metadata.yml
+++ b/metadata.yml
@@ -1,6 +1,6 @@
 name: "heat"
 version: "2016.4.1"
-source: "https://github.com/openstack/salt-formula-heat"
+source: "https://github.com/salt-formulas/salt-formula-heat"
 dependencies:
-  - name: keystone
-    source: "https://github.com/salt-formulas/salt-formula-keystone"
+- name: keystone
+  source: "https://github.com/salt-formulas/salt-formula-keystone"