chore(deps): update docker/setup-buildx-action digest to 6229134

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@988b5a0280414f521da01fcc63a27aeeb4b104db
+        uses: docker/setup-buildx-action@622913496df23a5293cfb3418e5836ee4dd28f3a
 
       # Login against a Docker registry except on PR
       # https://github.com/docker/login-action