Chris Willman Music WriterPioneering Black country superstar Charley Pride will be the subject of a 90-minute CMT special set for August, the network is announcing today, with stars like Luke Combs, Garth Brooks, Mickey Guyton and Darius Rucker participating in the commemoration.Titled “CMT Giants: Charley Pride,” the special will be arriving when Pride-pride is still at a peak level, with his name constantly brought up in the current conversations about race and country music, and how his