curl security update

8.12.1-4.6 - fix cookie injection via trailing dot super cookies CVE-2026-8924 - fix digest auth state leak on origin or credential change CVE-2026-11856 - fix netrc password lookup for non-matching login CVE-2026-8926 8.12.1-4.5 - fix proxy auth not cleared properly on NULL CVE-2026-9079 - fix...