Merge pull request #43 from Tarow/renovate/docker-setup-buildx-action-4.x

chore(deps): update docker/setup-buildx-action action to v4

Author: Tarow

.github/workflows/ci.yaml

@@ -45,7 +45,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Extract metadata (tags, labels) for Docker
         id: meta