fix(apple): AppHangs need SentryCrash (#5785)

Point out that the app hang integration depends on the
SentryCrashIntegration.

Co-authored-by: Liza Mock <[email protected]>

Author: philipphofmann

src/platforms/apple/common/configuration/app-hangs.mdx

@@ -14,6 +14,8 @@ The event has the stack trace of all running threads so you can easily detect wh
 
 The app hangs code runs in the background when disabled when keeping out-of-memory tracking enabled, but it won't report app hangs. The out-of-memory tracking otherwise would report false errors if the OS kills your app caused by an app hang.
 
+Because the app hang detection integration uses SentryCrashIntegration to capture the stack trace when creating app hang events, if SentryCrashIntegration is disabled, the integration won’t work.
+
 To use this feature, add this to your code:
 
 ```swift {tabTitle:Swift}