[BE]: Update nlohmann submodule to 3.12.0 (#154817)

This is mostly compiler fixes, C++20 fixes, and clang-tidy fixes. Should be entirely backwards compatible with our current version
Pull Request resolved: https://github.com/pytorch/pytorch/pull/154817
Approved by: https://github.com/jansel, https://github.com/malfet
This commit is contained in:
Aaron Gokaslan
2025-06-02 01:29:58 +00:00
committed by PyTorch MergeBot
parent 2b2245d5db
commit 80af98c6c3