Get “on” your game, Kat! Gov. Kathy Hochul is getting roasted for saying she spent the day “in” Long Island — a gaffe that’s like nails on a chalkboard on the Queens side of the Whitestone . The Democratic governor, who was raised upstate, made the mistake of using “in” instead of the preferred “on” in a since-deleted social media post that was preserved by a reporter and Long Islander who called it a “rookie mistake.” “I spent the day in Long Island talking with seniors, small business owners,