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

.gitea/workflows/build-only.yaml

@@ -21,14 +21,14 @@ jobs:
 
       # Set up Docker Buildx for building the image
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
         with:
           driver: remote
           endpoint: 'tcp://buildkitd:1234'
 
       # Build the Docker image
       - name: Build Docker Image
-        uses: docker/build-push-action@v7
+        uses: docker/build-push-action@v6
         with:
           context: .                    # Build context (current directory)
           file: ./Dockerfile            # Path to Dockerfile