Update w3c.json (#422)

Author: caribouW3

w3c.json

@@ -1,9 +1,9 @@
 {
   "group": 45211,
   "contacts": [
-    "plehegar"
+    "carine"
   ],
   "shortName": "navigation-timing",
   "policy": "open",
   "repo-type": "rec-track"
-}
+}