Update metadata.yml with correct URL

Change-Id: Ie5bdfd34036dd0a270d24d7f833ff73d096a3b9e
diff --git a/metadata.yml b/metadata.yml
index 5770491..0560ef4 100644
--- a/metadata.yml
+++ b/metadata.yml
@@ -1,3 +1,3 @@
 name: "cassandra"
 version: "0.1"
-source: "https://github.com/tcpcloud/salt-formula-cassandra"
+source: "https://github.com/salt-formulas/salt-formula-cassandra"