[gha] Bump docker/setup-buildx-action from 3.0.0 to 4.0.0#469

dependabot[bot] wants to merge 2 commits intomainopen-edge-platform/os-image-composer:mainfrom

dependabot/github_actions/docker/setup-buildx-action-4.0.0open-edge-platform/os-image-composer:dependabot/github_actions/docker/setup-buildx-action-4.0.0Copy head branch name to clipboard