Summary:
The correct path for ccache storage dir is actually `/github/home/.cache/ccache`

## Changelog:

[INTERNAL] - Update ccache path

Pull Request resolved: https://github.com/facebook/react-native/pull/45674

Test Plan: CI

Reviewed By: cipolleschi

Differential Revision: D60236560

Pulled By: cortinico

fbshipit-source-id: bbce9081e6647e660c3f80d61d791268de5b75d1