chore(deps): update docker/setup-buildx-action action to v3.9.0 (#11)

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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -39,7 +39,7 @@ jobs:
       - uses: actions/checkout@v4
       - if: github.event_name != 'pull_request'
         uses: sigstore/cosign-installer@main
-      - uses: docker/setup-buildx-action@v3.8.0
+      - uses: docker/setup-buildx-action@v3.9.0
       - if: github.event_name != 'pull_request'
         uses: docker/[email protected]
         with: