Riley Safer Holmes & Cancila LLP today announced a restructuring that places Patricia Brown Holmes as its managing partner.The firm announcement indicates Holmes is the first black woman to lead a national firm that isn’t woman- or minority-owned.RSHC has swelled in size since it first opened in early 2016 with a 21-partner faction that left Schiff Hardin LLP.Among 73 attorneys in Chicago, San Francisco, New York and Ann Arbor, Mich., 52 percent of RSHC attorneys are women and 29 percent are minorities, according …