LOS ANGELES – Gabrielle Union and NBC said Tuesday that they have settled their differences in their dispute over her firing as a judge on “America's Got Talent,” which she said was retaliation for her complaints that the show tolerated racism on the set. “We’ve reached an amicable resolution," Union and the network said in a joint statement. "NBC Entertainment appreciates the important concerns raised by Gabrielle Union and remains committed to ensuring an inclusive and supportive working environment where people of all backgrounds are treated with respect.” Both sides declined further comment, and would not give further details.