[fix] change hello_world_host dockerfile path in gh actions

Signed-off-by: danbugs <[email protected]>

Author: danbugs

.github/workflows/publish-ghcr-images.yaml

@@ -30,7 +30,7 @@ jobs:
         uses: docker/build-push-action@v5
         with:
           context: .
-          file: chapter02/hello_world/hello_world_host/Dockerfile
+          file: chapter02/hello_world/Dockerfile
           push: true
           tags: ghcr.io/serverside-wasm-book-code/hello-world-host:latest
           platforms: linux/amd64,linux/arm64