Update: The headline was corrected to reflect that the state Board of Education agreed to change the way it prorates school funding, not the funding formula.SPRINGFIELD — The state Board of Education unanimously voted today to settle a 2008 lawsuit filed by the Chicago Urban League that alleged the state’s school funding formula discriminates against low-income and minority students.The board members did not discuss the agreement’s details during the meeting. But as part of the deal, the state body has …