When Justice Joy Cunningham takes her seat with the Illinois Supreme Court in December, she will be the second Black woman to serve on the high court in the state’s history, but she credits many women before her for shattering the glass ceiling.Cunningham, a New York native, joined the bench in 1996 as an associate judge with the Cook County Circuit Court.After a stint as senior vice president, general counsel and corporate secretary at Northwestern Memorial Healthcare, she returned to the bench in 2006 when she was …