President Bush has signed a resolution renaming the law that mandated gender equity in education after the late U.S. Rep. Patsy Mink.    The resolution, passed by Congress earlier this month, renames the landmark legislation known as "Title IX" after Mink. It now will be known as the "Patsy T. Mink Equal Opportunity in Education Act."    The resolution notes Mink "was a passionate and persistent fighter against economic and social injustices in Hawaii and across America."    Bush signed the legislation yesterday along with six other bills and resolutions, the White House said.    Mink, a Democrat, died in Honolulu of pneumonia Sept. 28. Her name remains on the Nov. 5 ballot for the 2nd District congressional race opposite Republican Bob McDermott.