修正库错误

src/main.rs

@@ -117,7 +117,7 @@ async fn shutdown_signal(deletion_task_abort_handle: tokio::task::AbortHandle) {
 
     #[cfg(unix)]
     let terminate = async {
-        signal::unix::signal(signal::unix::SignalKind::terminate())
+        tokio::signal::unix::signal(signal::unix::SignalKind::terminate())
             .expect("failed to install signal handler")
             .recv()
             .await;