By Joshua Clipperton THE CANADIAN PRESS TORONTO-Brandon Montour unloaded a one-timer and watched the puck hit the back of the net before dropping to one knee and sweeping his glove over the ice in celebration. The third-period goal on a delayed penalty took the air out of Scotiabank Arena and gave his Florida Panthers breathing room on the way to a 4-2 victory in Game 1 of their second-round playoff series against the Toronto Maple Leafs. For anyone not paying attention this season, Montour stepping up in a key moment has become the norm. The 29-year-old defenceman nearly doubled his career high with 73 points in 2022-23 after finally getting the chance to play a bigger role in his eighth NHL campaign. Largely a third-pair blueliner until this past fall,…