By Bryna Jean-Marie The Under Armour executive is driving change as the company celebrates 25 successful years and goes into overdrive for a booming future. Sports Illustrated and Empower Onyx are putting the spotlight on the diverse journeys of Black women across sports—from the veteran athletes, to up-and-coming stars, coaches, executives and more—in the series, Elle-evate: 100 Influential Black Women in Sports. It’s been just shy of a year since Charece Williams Gee joined the Under Armour team as senior director and head of sports marketing, and she is already making an impact. Gee came in…