tracking GitHub Runner releases

As a follow-up of https://gitlab.cern.ch/mlops/project/-/issues/594 we should track github runner releases with some sort of mechanism and update accordingly so they don't break in the future.

As context GitHub agressively decomissions their runner versions, so we have to update quite often.

https://argocd-image-updater.readthedocs.io/en/stable/ - this might be useful to track new github runner image releases and automatically send a PR in our repo with the updated version.