Github Actions(deps): Bump dawidd6/action-download-artifact from 6 to 8#20

dependabot[bot] wants to merge 1 commit intomaingreen-elephpant/carbon-aware:mainfrom

dependabot/github_actions/dawidd6/action-download-artifact-8green-elephpant/carbon-aware:dependabot/github_actions/dawidd6/action-download-artifact-8Copy head branch name to clipboard