Upgrade to Authelia 4.38.15

Automated Docker container micro upgrade by means of Watchtower infrastructure.

4.38.11 (2024-09-20)
4.38.12 (2024-09-22)
4.38.13 (2024-09-28)
4.38.14 (2024-09-29)
4.38.15 (2024-09-30)