fixed max file opened limit

src/main.rs

@@ -65,6 +65,7 @@ async fn main() {
 				drop(pingscores);
 				let mut file = fs::OpenOptions::new().write(true).truncate(true).open("pingscores.json").unwrap();
 				file.write_all(file_contents.as_bytes()).unwrap();
+				file.flush().unwrap();
 			}
 		}
 	);