use correct action for setup buildx

.github/workflows/publish-docker.yml

@@ -73,7 +73,7 @@ jobs:
         uses: docker/setup-qemu-action@v2
       - 
         name: Set up Docker Buildx
-        uses: docker/build-push-action@v2
+        uses: docker/setup-buildx-action@v2
       - 
         name: Login to DockerHub
         uses: docker/login-action@v2