net/traefik: Update to upstream release 2.11.3

Details:

• Bugfix release, see https://github.com/traefik/traefik/releases/tag/v2.11.3
• The website lists CVE-2024-24788 as security reference, but this is not a vulnerability in traefik itself, but in the Go stdlib, which was fixed in Go 1.22.3.

MFH: 2024Q2
Security: CVE-2024-24788