Update links to destination filters and edge functions for mobile (#4785)

Currently these links don't send you anywhere

Author: bcaudillo

src/connections/sources/catalog/libraries/mobile/apple/index.md

@@ -37,7 +37,7 @@ Analytics Swift adds several improvements to the overall experience of using the
 ### Device Mode Transformations & Filtering
 For the first time ever, developers can filter and transform their users’ events even before the events leave the mobile device. What’s more, these Filters & transformations can be applied dynamically (either through the Segment Dashboard, or Javascript uploaded to the workspace) and do not require any app updates.
 
-Learn more about [Destination Filters]() on Mobile, and [Edge Functions]() on Mobile. 
+Learn more about [Destination Filters](https://github.com/segmentio/DestinationFilters-swift) on Mobile, and [Edge Functions](https://github.com/segmentio/EdgeFn-Swift) on Mobile. 
 
 ## Getting started
 To get started with the Analytics Swift mobile library:
@@ -150,4 +150,4 @@ Analytics for Swift is built with extensibility in mind. Use the tools list belo
 - [Code samples](/docs/connections/sources/catalog/libraries/mobile/swift/swift-samples)
 
 > warning ""
-> If you are using the Analytics iOS (Classic) SDK, you can find [the documentation here](/docs/connections/sources/catalog/libraries/mobile/ios). Many of the features available in the Analytics Swift SDK are not available in the Analytics iOS (Classic) SDK. 
+> If you are using the Analytics iOS (Classic) SDK, you can find [the documentation here](/docs/connections/sources/catalog/libraries/mobile/ios). Many of the features available in the Analytics Swift SDK are not available in the Analytics iOS (Classic) SDK.