Aroldis Chapman’s epic showing masks Yankees’ other concern

TORONTO — The music — “2 Dollar Bill,” by 2 Chainz — sounded louder than usual, as did high-energy reliever Tommy Kahnle, while the Yankees dressed and packed their belongings in the snug Rogers Centre visitors’ clubhouse. All wins produce a soundtrack, as per the mandate of DJ Aaron Judge. This one, however, a 1-0…