Update docker.io/photoprism/photoprism Docker tag to v250426

Update docker.io/photoprism/photoprism Docker tag to v250426

No problems upgrading the Docker container with a Docker compose yaml file and by means of Portainer GitOps.

This MR contains the following updates:

Package Update Change
docker.io/photoprism/photoprism major 250425-ce -> 250426-ce