Update docker/setup-buildx-action action to v4

.gitea/workflows/docker-build.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu
     steps:
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
       - name: Check out repository code
         uses: actions/checkout@v6
       - name: Login to Docker Registry
@@ -17,7 +17,7 @@ jobs:
           username: ${{ gitea.actor }}
           password: ${{ secrets.REGISTRY_TOKEN}}
       - name: Build and push
-        uses: docker/build-push-action@v7
+        uses: docker/build-push-action@v6
         with:
           context: .
           file: build/Dockerfile