Bump minimum version of activesupport for CVE-2023-38037 (#42023)

Summary:
Bump activesupport to minimum 6.1.7.5 CVE-2023-38037. More details https://github.com/advisories/GHSA-cr5q-6q9f-rq6q

Updated the gemfile and then ran `bundle install` at the root

## Changelog:

[IOS] [SECURITY] - Bump activesupport to minimum 6.1.7.5 CVE-2023-38037.

Pull Request resolved: https://github.com/facebook/react-native/pull/42023

Reviewed By: cipolleschi

Differential Revision: D52346223

Pulled By: lunaleaps

fbshipit-source-id: f8141048b68cde9c58eb23ee2d41cb4a6becb6ef