Update actions/checkout action to v6#80

renovate-runner[bot] wants to merge 1 commit intomasterWyriHaximus/github-action-supported-php-versions:masterfrom

renovate/update-github-tags-actions-checkout-v6-0-1WyriHaximus/github-action-supported-php-versions:renovate/update-github-tags-actions-checkout-v6-0-1Copy head branch name to clipboard