CANNES, France — Swedish director Ruben Ostlund’s class warfare comedy “Triangle of Sadness” won the Palme d’Or at the 75th Cannes Film Festival on Saturday, giving Ostlund one of cinema’s most prestigious prizes for the second time. Korean star Song Kang Ho was named best actor for his performance in Japanese director Hirokazu Kore-eda’s film “Broker,” about a Korean family …
