MIAMI—The Miami Heat knew the run was coming. Even early in the fourth quarter, with a 23-point lead, Heat players were telling each other that the game wasn’t over. They were right. And they handled the moment—then moved atop the Eastern Conference. Jimmy Butler broke LeBron James’ record for triple-doubles in a Miami uniform, Duncan Robinson scored 25 points and the Heat held off a furious comeback attempt from the Los Angeles Lakers on the way to a 113-107 win on Sunday night. “I think those are important experiences to go through together,” Heat coach Erik Spoelstra said. The win, combined with losses by Brooklyn and Chicago, put Miami (30-17) at the top of the East, a half-game ahead of the Nets (29-17) and a game clear of the Bulls (28-17). Butler finished with 20 points, 10 rebounds and 12 assists for Miami, his 10th regular-season triple-double for the Heat—one …