ATLANTA—Led by an unlikely hero, the Atlanta Braves are heading back to a place that used to be so familiar to them. The World Series. Eddie Rosario capped a remarkable NL Championship Series with a three-run homer, sending the Braves to the biggest stage of all with a 4-2 victory over the defending champion Los Angeles Dodgers on Saturday night. The Braves won the best-of-seven playoff four games to two, exorcising the demons of last year’s NLCS—when Atlanta squandered 2-0 and 3-1 leads against the Dodgers—and advancing to face the AL champion Astros. Game 1 is Tuesday night at Minute Maid Park in Houston. “It’s a great moment in my life,” Rosario said through an interpreter. “But I want more. I want to win the World Series.” The Braves were Series regulars in the 1990s, winning it all in ’95 with a team that included Hall of Famers Greg Maddux, …