Update docker/setup-buildx-action digest to 2ad1852

Author: renovate[bot]

.github/workflows/docker-publish.yml

@@ -48,7 +48,7 @@ jobs:
 
       # Workaround: https://github.com/docker/build-push-action/issues/461
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@4fd812986e6c8c2a69e18311145f9371337f27d4
+        uses: docker/setup-buildx-action@2ad185228a349d19414702819e06df9fa4314287
 
       # Login against a Docker registry except on PR
       # https://github.com/docker/login-action