chore(deps): Bump docker/setup-buildx-action from 3.12.0 to 4.0.0

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 3.12.0 to 4.0.0.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@v3.12.0...v4.0.0)

---
updated-dependencies:
- dependency-name: docker/setup-buildx-action
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/dotnet-cd.yml

@@ -94,7 +94,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3.12.0
+        uses: docker/setup-buildx-action@v4.0.0
 
       - name: Build and push Docker image to GitHub Container Registry
         uses: docker/build-push-action@v6.19.2