Elon Musk has taken to social media to suggest that Harry Potter author J.K. Rowling, who has become known in recent years for her vocal anti-transgender rhetoric, should find another subject to talk about, RadarOnline.com has learned. The tech billionaire responded to a lengthy tweet from Rowling posted nearly a month ago, writing, “While I heartily agree with your points regarding sex/gender, may I suggest also posting interesting and positive content on other matters?” In the original 700-word rant, the controversial novelist reiterated that she doesn’t think transgender women are women. “I…