Update metadata.yml with correct URL

Change-Id: If9ee1ba445c891d29201fb521a0dc982d8a22f7f
diff --git a/metadata.yml b/metadata.yml
index 4c8dc57..b61faf3 100644
--- a/metadata.yml
+++ b/metadata.yml
@@ -1,3 +1,3 @@
 name: "sphinx"
 version: "0.2"
-source: "https://github.com/tcpcloud/salt-formula-sphinx"
+source: "https://github.com/salt-formulas/salt-formula-sphinx"