Now that Mark Zuckerberg and fellow tech billionaire Elon Musk are in talks to face each other in a mixed martial arts bout, fighters are picking sides and offering training help. Picking his side and offering to be ‘training partner,’ UFC Heavyweight Champion Jon Jones says he’s on ‘Team Zuck.’ Jones made the offer on Twitter, Musk-owned social media platform. “You already know I am Team Zuck….