[clang] [clang-tools-extra] [clangd] Fix: exclude insertions at end of CursorPlaceholder in formatting (PR #87746)

[Younan Zhang via cfe-commits]

zyn0217 wrote:

AFAIK the Windows CI has been rather fragile recently, and I think you could probably ignore it.

https://github.com/llvm/llvm-project/pull/87746