Update metadata.yml with correct URL

Change-Id: I9a9053e3771d920ecfea30115bd6191c0c6959f6
diff --git a/metadata.yml b/metadata.yml
index 6b8418c..e8276c0 100644
--- a/metadata.yml
+++ b/metadata.yml
@@ -1,4 +1,4 @@
 name: "iptables"
 version: "0.2"
-source: "https://github.com/tcpcloud/salt-formula-iptables"
+source: "https://github.com/salt-formulas/salt-formula-iptables"