Bump docker/setup-buildx-action from 3.0.0 to 3.1.0 (#239)

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 3.0.0 to 3.1.0.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@f95db51...0d103c3)

---
updated-dependencies:
- dependency-name: docker/setup-buildx-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

.github/workflows/ci.yml

@@ -65,7 +65,7 @@ jobs:
           sed -i 's|\${NGINX_PLUS_VERSION}/||g' docker/Dockerfile
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # v3.0.0
+        uses: docker/setup-buildx-action@0d103c3126aa41d772a8362f6aa67afac040f80c # v3.1.0
 
       - name: Build Plus Docker Image
         uses: docker/build-push-action@af5a7ed5ba88268d5278f7203fb52cd833f66d6e # v5.2.0