Update docker/setup-buildx-action digest to b467d6a (#65)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/docker-publish.yml

@@ -45,7 +45,7 @@ jobs:
 
       # Workaround: https://github.com/docker/build-push-action/issues/461
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@aa33708b10e362ff993539393ff100fa93ed6a27
+        uses: docker/setup-buildx-action@b467d6aa7afffae6d3d466d2a74bd266618f87d6
 
       # Login against a Docker registry except on PR
       # https://github.com/docker/login-action