The Rockets were saved by the whistle. After the Knicks roared back from down 16 in Houston, and after Jalen Brunson sized up Rockets defensive stopper Dillon Brooks and drained a game-tying step-back two with less than 10 seconds in the fourth quarter, officials whistled Brunson for a foul on a three-point shooter. Knicks center Precious Achiuwa rejected Rockets star Jalen Green’s attempt at a go-ahead layup with 1.1 seconds left on the game clock, and the ball careened well beyond the three-point line to Houston’s Aaron Holiday, who vaulted a three towards the rim as the game clock expired. …