The National Labor Relations Board has filed a complaint against Apple, alleging that the company “discriminated against employees” at its World Trade Center store, according to Kayla Blado, a spokesperson for the regulator. The NLRB’s investigation was spurred by charges filed in May by the Communications Workers of America, the union working with organizers at Apple retail stores in New York, Atlanta, and Oklahoma. The later store is preparing to hold a vote later this month on…