Voit steps up as a new leader now that Soto and Bell are gone; manager Martinez excited about new prospects … WASHINGTON – Forget for a second, if possible, that incredible plate discipline and the amazing on-base percentage for Juan Soto. At the age of 23, Soto was becoming a clubhouse presence this year. “He was becoming that leader. He tried to lead by example,” Washington manager Dave Martinez said here Friday at Nationals Park. Soto and first baseman Josh Bell, of course, were traded to the Padres in late July and returned to town this weekend with their new…