[research_projects] deal with security alerts
for 2 weeks now dependabot keeps on complaining about old PL versions hardcoded in research_projects that have a vulnerability.

This PR may break those abandoned examples but at least give the developers some peace of mind.

Perhaps it's time to move research_projects that have been abandoned to their own repo.

@LysandreJik 
_The documentation is not available anymore as the PR was closed or merged._<|||||>Good idea, @LysandreJik - done

Please review with whitespace-ignore filter on:
https://github.com/huggingface/transformers/pull/15594/files?diff=split&w=1