Poster: First of all, thanks for trying to help!
If that is what happened, you can call and tell her you looked into the idea and that it wasn’t shayech, but that you will continue to keep her in mind.
You don’t need to tell her it’s because of something you saw on her resume- you can just keep it vague and let her think it’s because you looked into the guy, and didn’t think he was appropriate for her…