INGLEWOOD, Calif.—Justin Herbert and the Los Angeles Chargers had the uncanny knack of blowing double-digit leads and losing in the last minute. Not anymore. Herbert threw a 53-yard touchdown pass to Mike Williams with 2:17 remaining as the Chargers rallied to hold off the Pittsburgh Steelers 41-37 despite blowing a 17-point lead at the beginning of the fourth quarter. Five of the Chargers’ six wins this season have been fourth-quarter comebacks. Last season, they lost five times when leading in the fourth. “We had our best stuff at the end,” first-year coach Brandon Staley said. “I feel like we’ve shown real stuff through 10 games. I’m really proud of this group. This game was one of my favorites, for sure.” Herbert is the fifth quarterback in NFL history to throw for at least 300 yards passing and have at least 90 yards rushing in the same game. He passed for …