CLEANSTART-2026-MT87541 Security fixes in cert-manager 1.20.3-r2

Package cert-manager version 1.20.3-r2 fixes 5 vulnerabilities: ghsa-mpwr-8vm7-h73f, CVE-2026-56852, ghsa-hrxh-6v49-42gf, CVE-2026-39822, CVE-2026-42505...