How do you do, fellow Knicks fans? Mayoral front-runner Zohran Mamdani donned crisp new Knicks merch and tried to act like an average hoops fan in the “nosebleed” seats at Madison Square Garden Sunday — a transparent retort to Andrew Cuomo’s photo-op last month from high-end courtside seats. Mamdani was joined by a podcaster and the New York Times, which called the appearance “low-key” even as the candidate’s social media posts went viral. Mamdani has admitted he’s into soccer and cricket, not