Celebrity birthdays for the week of Nov. 23-29: Nov. 23: Actor Franco Nero (“Django,” “Camelot”) is 84. Screenwriter Joe Eszterhas (“Basic Instinct,” “Showgirls”) is 81. Comedy writer Bruce Vilanch (“Hollywood Squares”) is 78. Singer Bruce Hornsby is 71. Actor Maxwell Caulfield (“The Colbys”) is 66. Actor John Henton (“The Hughleys,” ″Living Single”) is 65. “Good Morning America” co-host Robin Roberts is 65. Singer-guitarist Ken Block of Sister Hazel is 59. Actor Salli Richardson-Whitfield (“