The battle for the Hudson River at UFC 328 belongs to New Jersey — to the elation of a partisan crowd and the fighter’s teenage son fresh off a successful battle against cancer. Jim Miller, of Sparta, N.J., picked up a victory by guillotine choke submission at 3:29 of the first round over Astoria, Queens native Jared Gordon on Saturday night at Prudential Center during the prelims in a rare clash of products from the neighboring states. Miller (39-19, 29 finishes), during postfight remarks in the octagon with his wife and four children in attendance, paid tribute to 14-year-old son Wyatt after the youngster recovered from rhabdomyosarcoma — a rare cancer of the soft tissue — the family discovered last summer. Jim Miller reacts during the fight against Jared Gordon during UFC 328 at Prudential Center. John Jones-Imagn Images “My son went through some really difficult times in the last couple of months. He ended up kicking the s–t out of cancer, and he’s all good today. We are cancer free.…