chore(deps): update docker/setup-buildx-action action to v3.12.0#12

bitnik wants to merge 1 commit intomainunbyte-de/container-images:mainfrom

chore/renovate-docker-setup-buildx-action-3.xunbyte-de/container-images:chore/renovate-docker-setup-buildx-action-3.xCopy head branch name to clipboard