net/traefik: Update to upstream version 3.3.6

Details:

• Bugfix update, see: https://github.com/traefik/traefik/releases/tag/v3.3.6
• URL paths are now sanitized by default. In rare circumstances, updating the configurarion may be necessary: https://doc.traefik.io/traefik/v3.3/migration/v3/#request-path-sanitization

MFH: 2025Q2