CHICAGO — An Illinois appellate court on Wednesday sided with Chicago Public Schools in vacating a temporary restraining order that prevented the district from taking employment action against six CPS teachers for refusing to submit proof of vaccination or undergo weekly tests for COVID-19. The ruling restores the district’s ability to enforce the requirement while a lawsuit challenging the practice continues in a downstate courtroom. “We stress the weekly test defendant is requiring plaintiffs to take is noninvasive, nonharmful, self-administered, free to the teachers, available on school pro…