A group of civil rights attorneys initiated a united legal challenge Thursday against Gov. J.B. Pritzker and the Illinois Department of Corrections, demanding the immediate release of Illinois prisoners vulnerable to the coronavirus.The endeavor includes a proposed class-action lawsuit filed Thursday morning in federal court that names Pritzker and Rob Jeffreys, acting director of the Illinois Department of Corrections, as defendants.Ten IDOC prisoners are named as plaintiffs in the federal filing.“To effectively …