Update metadata.yml with correct URL

Change-Id: I10085556e7fc54c279ac42c2daa8b1397773cfa3
diff --git a/metadata.yml b/metadata.yml
index 17eca65..4cb1cd3 100644
--- a/metadata.yml
+++ b/metadata.yml
@@ -1,3 +1,3 @@
 name: "grafana"
 version: "0.2"
-source: "https://github.com/tcpcloud/salt-formula-grafana"
+source: "https://github.com/salt-formulas/salt-formula-grafana"