[llvm-branch-commits] [llvm] release/20.x: [libc++][ci] Update the Windows toolchains to Clang 19 (#129232) (PR #129303)

[Martin Storsjö via llvm-branch-commits]

mstorsjo wrote:

> @frederick-vs-ja What do you think about merging this PR to the release branch?

I think @ldionne or @philnik777 should reply here. Without this, I guess the clang-cl CI configs will fail on the 20.x release branch.

https://github.com/llvm/llvm-project/pull/129303