[llvm] [llvm-rc] Handle Windows line endings in tag-html test (PR #113000)

[Daniel Paoliello via llvm-commits]

dpaoliello wrote:

@llvm/pr-subscribers-windows can I believe get a review for this: it fixes the last failure we've been seeing in the PR builds for Windows.

https://github.com/llvm/llvm-project/pull/113000