Generate new reference files for CI test

In order to generate a new set of reference files you need to trigger a dedicated CI build.
Once you have the CI set up:
you can trigger a CI build following instruction here
but using a dedicated CI workflow. The list of CI workflow is available here:
among the ArgoNeuT ones you need to use "Update_ref_files_ARGONEUT_wf"

In short, when the CI is set up, you need t run the command:

trigger --build-delay 0 --workflow Update_ref_files_ARGONEUT_wf --force-platform slf7