🤖️ GH Actions (deps): Bump docker/setup-buildx-action

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from a946f06b5ddbde456d0115dc585e8dc3c7a0c3e0 to a530e948adbeb357dbca95a7f8845d385edf4438.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@a946f06...a530e94)

---
updated-dependencies:
- dependency-name: docker/setup-buildx-action
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/docker-publish.yml

@@ -43,7 +43,7 @@ jobs:
 
       # Workaround: https://github.com/docker/build-push-action/issues/461
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@a946f06b5ddbde456d0115dc585e8dc3c7a0c3e0
+        uses: docker/setup-buildx-action@a530e948adbeb357dbca95a7f8845d385edf4438
 
       # Login against a Docker registry except on PR
       # https://github.com/docker/login-action