[clang] [clang][docs] Fix docs-clang-html. (PR #142387)

[Abid Qadeer via cfe-commits]

abidh wrote:

> I think I am seeing something similar on CI:
> 
> https://github.com/llvm/llvm-project/actions/runs/15387162550/job/43288136977?pr=140278

Thanks for reporting this. I think I will reopen it.


https://github.com/llvm/llvm-project/pull/142387