Univision will begin showing Season 1 of Sesame Amigos, a new 30-minute Spanish-language program from Sesame Workshop, on August 1 at 8:30 A.M. ET/PT in its Saturday children's programming block "Planeta U." The network has scheduled 26 episodes featuring Elmo, Cookie Monster, Bert & Ernie and other familiar denizens of Sesame Street. Along with signature segments promoting learning, cooperation and being nice, each show will also feature the characters interacting with a…