chore(deps): update docker/setup-buildx-action digest to 18ce135

Author: renovate[bot]

.github/workflows/docker-publish.yml

@@ -42,7 +42,7 @@ jobs:
 
       # Workaround: https://github.com/docker/build-push-action/issues/461
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@622913496df23a5293cfb3418e5836ee4dd28f3a
+        uses: docker/setup-buildx-action@18ce135bb5112fa8ce4ed6c17ab05699d7f3a5e0
 
       # Login against a Docker registry except on PR
       # https://github.com/docker/login-action