Make "Nai Diffusion" and "Stable Diffusion" banned artists

Posted under Tags

I don't think it makes any more sense then than it does now. However, in light of post #5751545 and discussion in the AI check thread, I propose an alternative: Apply a banned_artist equivalent to artist tags that purely use AI-generation, as an additional sanity check. It'd help mostly with the ones that don't say they use it unlike this example.