tag model_servers container image on release

[axel7083]

In ai-lab we often uses the some the image with :latest tag for the model_servers. To improve stability and avoid possible regression we think the images should be tagged on release.

E.g. the whisper image would be available as ghcr.io/containers/whispercpp:v1.2.0 next release.

The change would be necessary in the https://github.com/containers/ai-lab-recipes/blob/main/.github/workflows/model_servers.yaml file