Update w3c.json to reflect new ownership of repo

Author: dontcallmedom

w3c.json

@@ -1,5 +1,5 @@
  {
-    "group":      [80485]
+    "group":      ["cg/privacycg"]
 ,   "contacts":   ["cwilso"]
 ,   "repo-type":  "cg-report"
 }