By Cameron Flynn Jaguars’ edge rusher Josh Allen hadn’t experienced the postseason in his four-year NFL career until last Saturday’s unbelievable comeback win over the Chargers. Now, he’s feeling confident. Allen spoke to NBC before today’s divisional playoff matchup between the Jaguars and Chiefs and made this bold prediction. “We’re going to win this game,” Allen said. “That’s our mentality. We’re going to win. We’re going to win.” It’s hard to knock Allen’s confidence here. Despite falling in a 27-point hole to the Chargers last Saturday in the wild card round, Allen and the Jaguars battled…