update migration

README.md

@@ -53,7 +53,7 @@ async fn index(info: web::Path<(u32, String)>) -> impl Responder {
 async fn main() -> std::io::Result<()> {
     HttpServer::new(|| App::new().service(index))
         .bind("127.0.0.1:8080")?
-        .start()
+        .run()
         .await
 }
 ```