Iowa football has a real shot at making the College Football Playoff in 2024 as the field expands to 12 teams. Just don’t call the Hawkeyes a dark horse contender. It’s not because head coach Kirk Ferentz or anyone will be particularly offended by the idea that the Hawkeyes might sneak up on folks as a playoff contender. No, avoid that term, unless you have the definition readily available for Ferentz. “What’s the mean, exactly, dark horse? I’ve never asked anybody that,” Ferentz said at Big Ten Media Days. “So who wins the Kentucky Derby, the dark horse of the lighter horse? Palomino? Or is t…