[llvm] [ci] Bump the version of clang-format used in the CI (PR #119915)

[Louis Dionne via llvm-commits]

ldionne wrote:

This is a strawman, I mostly want to see what people think about this but I imagine we'll need to discuss on Discourse first.

CC @huixie90 

https://github.com/llvm/llvm-project/pull/119915