Making the `download-artifacts.sh` script be more useful.
Before, it would error upon seeing some zip files that it doesn't expect
to be in the GH release. I think the script is just a bit outdated. But
for now, I think we should bypass that, since the script is already
written to know which of the final files within the archives are
actually needed.
related PR
https://github.com/slsa-framework/slsa-github-generator/pull/3589
Signed-off-by: Ramon Petgrave <ramon.petgrave64@gmail.com>