Update Team Contact

Author: plehegar

w3c.json

@@ -3,8 +3,8 @@
     "wg/json-ld"
   ],
   "contacts": [
-    "plehegar"
+    "pchampin"
   ],
   "shortName": "json-ld-syntax",
   "repo-type": "rec-track"
-}
+}