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

[George Burgess IV via llvm-commits]

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

> Who knows, maybe you are now social-engineering yourself into this group? :)

Seems like a bold strategy, but I agree with the sentiment given that it's trivial for another RH member member to ack this.

I count @cuviper's thumbs-up on the PR as an ack, so LGTM

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