v2_migration_guide - Add note about withCheckedContinuation (#310)

* Add note about withCheckedContinuation in migration guide * fix issue as affecting Xcode 16 beta 5+ * clarify issue is with withCheckedContinuation
paypal · Dec 3, 2024 · 8194323 · 8194323
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diff --git a/v2_MIGRATION_GUIDE.md b/v2_MIGRATION_GUIDE.md
@@ -219,6 +219,11 @@ class MyViewController {
     }
 }
 ```
+* Note about using async/await functions: Our async/await functions utilize `withCheckedContinuation`
+There were crashes reported in use of `withCheckedContinuation` with Xcode 16 beta 5+ with earlier iOS 18 beta versions.
+Also there were reported issues with MacCatalyst apps using `withCheckedContinuation` built with Xcode 16 and running on MacOS 14-.
+The fix for MacCatalyst apps was released with Xcode 16.2 beta.
+https://github.com/swiftlang/swift/pull/76218#issuecomment-2377064768
 
 ### PayPalWebCheckoutClient
 ```swift