The date is set. Kenan Thompson will receive his star on the Hollywood Walk of Fame on Aug. 11. The history-making “Saturday Night Live” star will be honored with the 2,728th star from the Hollywood Chamber of Commerce. The ceremony will take place on Hollywood Boulevard, where his star will be placed next to one named for his longtime “SNL” boss, Lorne Michaels. Thompson holds the distinction of being the longest-running “Saturday Night Live” cast member. The former Nickelodeon star and 2020 White Correspondents Dinner host joined the cast of the sketch comedy series in 2003. The 44-year-old …