Enable multi-arch build on GitHub

[grisu48]

Currently Multi-Arch build is not possible on GitHub, see https://github.com/grisu48/pasta/actions/runs/9430747805/job/25978614341

  /usr/bin/docker buildx version
  github.com/docker/buildx v0.14.1 59582a88fca7858dbe1886fd1556b2a0d79e43a3
/usr/bin/docker buildx build --iidfile /home/runner/work/_temp/docker-actions-toolkit-c1pcCD/iidfile --label org.opencontainers.image.created=2024-06-08T18:30:05.037Z --label org.opencontainers.image.description=Stupid simple pastebin service --label org.opencontainers.image.licenses=MIT --label org.opencontainers.image.revision=db9f5e8a9706b264679ff53adf552d823374628d --label org.opencontainers.image.source=https://github.com/grisu48/pasta --label org.opencontainers.image.title=pasta --label org.opencontainers.image.url=https://github.com/grisu48/pasta --label org.opencontainers.image.version=v0.7.3 --platform linux/amd64,linux/arm64 --tag ghcr.io/grisu48/pasta:v0.7.3 --tag ghcr.io/grisu48/pasta:latest --metadata-file /home/runner/work/_temp/docker-actions-toolkit-c1pcCD/metadata-file --push .
ERROR: Multi-platform build is not supported for the docker driver.
Switch to a different driver, or turn on the containerd image store, and try again.
Learn more at https://docs.docker.com/go/build-multi-platform/
Error: buildx failed with: Learn more at https://docs.docker.com/go/build-multi-platform/