net/traefik: Update to upstream release 2.11.6

Details:

• Bugfixes and security fix, see https://github.com/traefik/traefik/releases/tag/v2.11.6

MFH: 2024Q3
Security: CVE-2024-39321
(cherry picked from commit 5e926365d630f329d6a28c92ebb30e667ee857cd)