The University of Southern California has retired Caleb Williams’ No. 13 jersey and restored Reggie Bush’s No. 5 to its place of honor among the other retired numbers displayed on the Coliseum’s peristyle.The school announced both long-expected moves on social media Thursday, two days before the 13th-ranked Trojans’ home opener against Utah State.USC has retired only the uniform numbers of its eight Heisman Trophy winners — more than any other school. The school displays the honored numbers, which include O.J. Simpson’s No. 32, on oversized banners draping the peristyle steps at home games.“Home of the Heismans!” USC athletic director Jen Cohen wrote on social media. “More Heisman Trophy winners than any other university. Let’s go #5 and #13… Can’t wait to celebrate you.”Williams spent two seasons at USC and won the Heisman in 2022, right after he arrived with coach Lincoln Riley from Oklahoma. The quarterback was the No. 1 …