Bump actions/checkout from 5 to 6 in /.github/workflows#27

dependabot[bot] wants to merge 1 commit intomainiraf-community/iraf-mac-build:mainfrom

dependabot/github_actions/dot-github/workflows/actions/checkout-6iraf-community/iraf-mac-build:dependabot/github_actions/dot-github/workflows/actions/checkout-6Copy head branch name to clipboard