Bump actions/checkout from 5 to 6#83

ariostas merged 2 commits intomainhsf-training/hsf-training-scikit-hep-webpage:mainfrom

dependabot/github_actions/actions/checkout-6hsf-training/hsf-training-scikit-hep-webpage:dependabot/github_actions/actions/checkout-6Copy head branch name to clipboard