[submodule] Bump libfmt to 12.0.0 (#163441)

libfmt 12.0 brings new optimisations and fixes some compilation issues for clang 21 (https://github.com/fmtlib/fmt/pull/4477).
For a detailed release log, see https://github.com/fmtlib/fmt/releases/tag/12.0.0
Pull Request resolved: https://github.com/pytorch/pytorch/pull/163441
Approved by: https://github.com/Skylion007
This commit is contained in:
Yuanyuan Chen
2025-09-21 22:37:22 +00:00
committed by PyTorch MergeBot
parent 6ac2b3ae35
commit 8a281d7214