chore(delete-user-data): bump to node 16

Author: cabljac

delete-user-data/extension.yaml

@@ -62,7 +62,7 @@ resources:
       Cloud Storage.
     properties:
       location: ${param:LOCATION}
-      runtime: nodejs14
+      runtime: nodejs16
       eventTrigger:
         eventType: providers/firebase.auth/eventTypes/user.delete
         resource: projects/${param:PROJECT_ID}