test(s3s/http): fix keep alive test

    async fn keep_alive_body_fill_withespace() {

        let body = KeepAliveBody::new(

            async {

                tokio::time::sleep(Duration::from_millis(45)).await;

                tokio::time::sleep(Duration::from_millis(450)).await;

                let mut res = Response::with_status(StatusCode::OK);

                res.body = Bytes::from_static(b"hello world").into();

                Ok(res)

            },

            Duration::from_millis(10),

            Duration::from_millis(100),

            None,

        );