update supported destination list

Author: terence1988

src/privacy/faq.md

@@ -57,6 +57,8 @@ In addition to your Raw Data destinations (Amazon S3 and Data Warehouses), we ca
 - Google Analytics
 - Customer.io
 - Optimizely Full Stack
+- Google Cloud PubSub
+- Friendbuy (Cloud Destination)
 
 Segment cannot guarantee that data is deleted from your Destinations. When you issue a user deletion request, Segment forwards the request to supported streaming Destinations. You must still contact these Destinations to confirm that they've executed the request.