Laurie Hernandez, the two-time medal-winning Olympic gymnast, joins the Broadway company of & Juliet on March 17. Hernandez makes her Broadway debut as part of the show's ensemble, in the featured dance role of Charmion, at the Sondheim Theatre for performances through June 14. Hernandez was part of the U.S. Women's Gymnastics team dubbed the "Final Five" at the 2016 Rio de Janeiro Summer Olympics, winning a gol…