Update PyBind to official v2.6.2 tag (#52304)
Summary:
This moves PyBind module from pre-2.6.2 to an official 2.6.2 release hash.
See https://github.com/pybind/pybind11/releases/tag/v2.6.2
Pull Request resolved: https://github.com/pytorch/pytorch/pull/52304
Reviewed By: samestep
Differential Revision: D26463177
Pulled By: malfet
fbshipit-source-id: 6c6c5d0a4ff0c3f399370194e90dc8295fdd4bb2
