Merge pull request #157 from smallstep/dependabot/github_actions/dock…

…er/setup-buildx-action-3

Bump docker/setup-buildx-action from 1 to 3

.github/workflows/docker-image.yml

@@ -39,7 +39,7 @@ jobs:
         uses: docker/setup-qemu-action@v1
       - name: Set up Docker Buildx
         id: buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v3
       - name: Docker Buildx (build)
         run: |
           docker buildx build --output "type=image,push=false" ${{ steps.prepare.outputs.buildx_args }}