Merge pull request #368 from open-contracting/dependabot/github_actio…

…ns/docker/setup-buildx-action-2

build(deps): bump docker/setup-buildx-action from 1 to 2

.github/workflows/docker.yml

@@ -18,7 +18,7 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
       # https://github.com/docker/setup-buildx-action#usage
-      - uses: docker/setup-buildx-action@v1
+      - uses: docker/setup-buildx-action@v2
       # https://github.com/docker/build-push-action#usage
       - uses: docker/build-push-action@v2
         with: