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

[Kristof Beyls via llvm-commits]

kbeyls wrote:

> Thanks for all the reviews and approvals. May I merge this PR myself or should I wait for a current member to do this?

As per https://llvm.org/docs/Security.html#choosing-new-members, I was waiting for "5 business days" since "a majority of existing LLVM Security Group members" supports the the nomination.
If I calculated correctly, these 5 business days have just passed, so I'll go ahead and merge this PR.

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