net/traefik: Update to upstream release 3.4.1
Details:
- Security fix, see https://github.com/traefik/traefik/releases/tag/v3.4.1
- Traefik now follows RFC 3986 percent-encoding normalization and RFC 3986 case normalization rules, see https://doc.traefik.io/traefik/migration/v3/#v341
Security: CVE-2025-47952
(cherry picked from commit 5b5f526d54f67e89e062a84bde16f369241971bd)