OpenAI hired a voice actress with a pleasant, low, breathy voice who shares a hint of a regional accent with ScarJo to be one of a bunch of voices for their models. Eight months after releasing it, the CEO tweeted "her." It's not illegal to hire someone who sounds a bit like a celebrity for something, and certainly not one who literally sounds more like a different celebrity (Rashida Jones).
This isn't a violation of rights of publicity for a number of reasons, but the most dispositive of them is that she doesn't actually sound that much like ScarJo. There's no vocal fry! That's the most distinctive part of her voice!