(Bloomberg) — NBA superstar Steph Curry and a young fan from California have pushed Under Armour to include girls in the marketing and sales of the basketball star’s signature shoe. Until recently, Under Armour’s website listed the Curry 5 as an option in the menus for men, women and boys. Though the shoe’s sizes are the same for all kids regardless of gender, it wasn’t listed for girls. Earlier this week, a 9-year-old California girl named Riley Morrison wrote an open letter to Curry, posted online by her father, in which she says she was disappointed to see the shoes were listed only for boys. “I know you support girl athletes because you have two daughters and you host an all-girls basketball camp,” she wrote. “I hope you can work with Under Armour to change this because girls want to rock the Curry 5’s too.” Curry, who has been with the Baltimore-based company since 2013, was quick to respond. Thursday he posted a letter to Morrison on Twitter saying he’d spent the past two da...