Bump iOS from 11.0 to 12.4 in Hermes eng podspec (#33939)
Bump iOS from 11.0 to 12.4 in Hermes eng podspec (#33939)

Summary:
Deprecate iOS/tvOS SDK 11.0 support now that 12.4+ is required

Context: https://github.com/facebook/react-native/pull/33935#issuecomment-1142253352

## Changelog

[iOS] [Fixed] - Deprecate iOS/tvOS SDK 11.0 support now that 12.4+ is required

Pull Request resolved: https://github.com/facebook/react-native/pull/33939

Reviewed By: hramos

Differential Revision: D36780553

Pulled By: cortinico

fbshipit-source-id: 64dd12742d1f9f949a89306dd3353ea24a31983d

janicduplessis/react-native,janicduplessis/react-native,facebook/react-native,facebook/react-native,facebook/react-native,janicduplessis/react-native,facebook/react-native,javache/react-native,javache/react-native,javache/react-native,javache/react-native,janicduplessis/react-native,javache/react-native,janicduplessis/react-native,javache/react-native,facebook/react-native,janicduplessis/react-native,facebook/react-native,javache/react-native,facebook/react-native,janicduplessis/react-native,javache/react-native,facebook/react-native,janicduplessis/react-native,javache/react-native,facebook/react-native