[iOS] Bump up the Cocoapods version (#53335)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/53335
ghstack-source-id: 123166245
(Note: this ignores all push blocking failures!)
Test Plan: CI
Reviewed By: xta0
Differential Revision: D26838693
fbshipit-source-id: 0007eba40b3145c8ba77b3211759f0609e17f561
