GHSA-WRJC-X8RR-H8H6 React Router: Open redirect via backslash in <Link> and useNavigate (CVE-2025-68470 bypass)

This is a follow up to CVE-2025-68470. React Router was alerted to certain scenarios in which the fix there was incomplete so there still existed some scenarios where attacker supplied paths passed to navigation mechanisms could result in unexpected external navigations...