Bump docker/setup-buildx-action from 3.8.0 to 3.9.0 (#279)

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](https://github.com/docker/setup-buildx-action/compare/6524bf65af31da8d45b59e8c27de4bd072b392f5...f7ce87c1d6bead3e36075b2ce75da1f6cc28aaca)

---
updated-dependencies:
- dependency-name: docker/setup-buildx-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>