Update MIGRATION.md

Author: zoontek

MIGRATION.md

@@ -4,7 +4,7 @@
 
 - Windows support ([#530](https://github.com/zoontek/react-native-permissions/pull/530))
 - Android 11 support
-- iOS 9 support dropped
+- iOS 14 support, iOS 9 support dropped
 - New iOS permission handlers: `Permission-LocationAccuracy` ([#503](https://github.com/zoontek/react-native-permissions/pull/503)) and `Permission-PhotoLibraryAddOnly` ([#510](https://github.com/zoontek/react-native-permissions/pull/510))
 - New methods for iOS14+: `checkLocationAccuracy`, `requestLocationAccuracy`, `openLimitedPhotoLibraryPicker` ([#503](https://github.com/zoontek/react-native-permissions/pull/503), [#510](https://github.com/zoontek/react-native-permissions/pull/510))
 - Support of the new `Limited` status for `PhotoLibrary` permission ([#510](https://github.com/zoontek/react-native-permissions/pull/510))