Bump docker/setup-buildx-action from 3.5.0 to 3.6.1 (#336)

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 3.5.0 to 3.6.1.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@aa33708...988b5a0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

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@aa33708b10e362ff993539393ff100fa93ed6a27 # v3.5.0
+        uses: docker/setup-buildx-action@988b5a0280414f521da01fcc63a27aeeb4b104db # v3.6.1
 
       - name: Build Plus Docker Image
         uses: docker/build-push-action@5176d81f87c23d6fc96624dfdbcd9f3830bbe445 # v6.5.0