CLEANSTART-2026-QE68045 Security fixes in sigstore-scaffolding 0.7.31-r0

Package sigstore-scaffolding version 0.7.31-r0 fixes 4 vulnerabilities: ghsa-59jp-pj84-45mr, ghsa-846p-jg2w-w324, ghsa-fphv-w9fq-2525, ghsa-4qg8-fj49-pxjh...