San Francisco-based Airbnb said Atlanta can help it improve its workforce diversity. It joins Microsoft, Apple, Comcast and other tech companies to choose Atlanta for expansions, new partnerships and charitable giving recently, with much of the focus on the city’s Black workforce. Airbnb wants to increase underrepresented minorities to 20% of its U.S workforce by 2025, up from 12% now, according to Laphonza Butler, the company’s public policy director. Airbnb also wants women to make up half its global workforce by 2025, up from about 47% now. “We wanted to set our expansion roots in a city with leaders who are committed to economic empowerment,” Butler said in an interview.