RANCHO MIRAGE, Calif.—Jennifer Kupcho’s maiden LPGA victory came Sunday, winning the 51st and final edition of the “Dinah Shore” tournament at Mission Hills Country Club; currently called the Chevron Championship as the new sponsor moves the tournament to Houston, Texas next year. Chevron increased the total purse to among the largest in women’s golf at $5 million, and 625 points are up for contention in the race to the CME Globe. Following early rounds of 66, and 70, Kupcho finished the tournament at 14-under with Sunday’s round of 74 to take the winning purse of $750,000. She had a six-stroke lead to start the final round after  Saturday’s low round of 64, capturing the 54-hole scoring record of 16-under. “I think it’s surreal. To be a major winner is really special, and to be the last person here at Mission Hills to jump into Poppie’s Pond, it’s all really special,” said the …