Merge pull request #3276 from segmentio/fb-offline-conv-update

Update FB Offline Conversions with API upgrade note

Author: stayseesong

src/connections/destinations/catalog/facebook-offline-conversions/index.md

@@ -6,6 +6,8 @@ id: 58ae54dc70a3e552b95415f6
 ---
 [Facebook Offline Conversions](https://www.facebook.com/business/help/1782327938668950?utm_source=segmentio&utm_medium=docs&utm_campaign=partners) enables offline event tracking, so marketers can run campaigns, upload transaction data, and compare in-store transactions.
 
+> info "Customer Information Parameters Requirements"
+> As of Facebook Marketing API v13.0+, Facebook began enforcing new requirements for customer information parameters (match keys). To ensure your events don't throw an error, Segment recommends that you review [Facebook’s new requirements](https://developers.facebook.com/docs/graph-api/changelog/version13.0#conversions-api){:target="_blank"}.
 
 ## Other Facebook Destinations Supported by Segment
 This page is about the **Facebook Offline Conversions**. For documentation on other Facebook destinations, see the pages linked below.