Ah sorry, didn't realize they had their own policy. This is a little stronger, but you can certainly still use an LLM to search for vulnerabilities, you would just need to write fixes yourself and mention if you used an LLM for assistance.

The rule you quoted is about code reviews, they don't want you using an LLM to write reviews or leave comments.

This is a pretty poorly written policy to be honest, so I understand if you interpret it to mean "no LLMs in any capacity", but I think if that's what they meant they would have said that. In fact they explicitly allow content "made with the help of AI", you just have to disclose it.