Update metadata.yml with correct URL

Change-Id: I37afb368cb8f6a694c16454f456dc71a189e6e4b
diff --git a/metadata.yml b/metadata.yml
index 1f289a6..24c97fd 100644
--- a/metadata.yml
+++ b/metadata.yml
@@ -1,3 +1,3 @@
 name: "isc_dhcp"
 version: "0.2"
-source: "https://github.com/tcpcloud/salt-formula-isc-dhcp"
+source: "https://github.com/salt-formulas/salt-formula-isc-dhcp"