[llvm] [Nomination] Add an extra Red Hat representative to the security group (PR #92174)

[Josh Stone via llvm-commits]

https://github.com/cuviper approved this pull request.

I'll make my ack more explicit. :)

I know Tulio in his role in the LLVM team at Red Hat, and I vouch for him to join this group.

https://github.com/llvm/llvm-project/pull/92174