Update Facebook App Events docs to include Swift

- It looks like this plugin was built for Facebook App Events for Swift, so Swift is also supported: https://github.com/segment-integrations/analytics-swift-facebook-app-events

Author: sarahrudy

src/connections/destinations/catalog/facebook-app-events/index.md

@@ -4,7 +4,9 @@ rewrite: true
 strat: facebook
 id: 56fc7e4680412f644ff12fb9
 ---
-[Facebook App Events](https://developers.facebook.com/docs/app-events){:target="_blank"} collects required information from one of Segment's mobile SDKs ([iOS](/docs/connections/sources/catalog/libraries/mobile/ios/){:target="_blank"} or [Android](/docs/connections/sources/catalog/libraries/mobile/android/){:target="_blank"}) and sends it from Segment's servers to Facebook App Events servers. This *server-to-server* connection will not work with our server-side libraries. The Facebook App Events Destination is open-source. You can browse the code on GitHub for [iOS](https://github.com/segment-integrations/analytics-ios-integration-facebook-app-events){:target="_blank"}.
+[Facebook App Events](https://developers.facebook.com/docs/app-events){:target="_blank"} collects required information from one of Segment's mobile SDKs ([iOS](/docs/connections/sources/catalog/libraries/mobile/ios/){:target="_blank"}, [Android](/docs/connections/sources/catalog/libraries/mobile/android/){:target="_blank"}, or [Swift](https://segment-docs.netlify.app/docs/connections/sources/catalog/libraries/mobile/apple/){:target="_blank"}) and sends it from Segment's servers to Facebook App Events servers. This *server-to-server* connection will not work with our server-side libraries. 
+
+The Facebook App Events Destination is open-source. You can browse the code on GitHub for [iOS](https://github.com/segment-integrations/analytics-ios-integration-facebook-app-events){:target="_blank"}.
 
 
 ## Other Facebook Destinations Supported by Segment