[llvm] update `llvm.spec` (PR #65452)

[Shao-Ce SUN via llvm-commits]

sunshaoce wrote:

> I'm surprised I was picked for that. How did you manage to reach me through this system? Don't we still use the Phabricator for doing reviews?

You have been automatically recommended as a reviewer by Github, and I am not sure what algorithm it is based on.

https://github.com/llvm/llvm-project/pull/65452