Change expression of countdown

src/main.rs

@@ -240,7 +240,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
             let mut remaining_time: u64 = 60 - elapsed_time;
 
             while remaining_time > 0 && 60 > remaining_time {
-                print!("\rstart tradingbot in {} seconds", remaining_time);
+                print!("\rstart tradingbot in {:2} seconds", remaining_time);
                 io::stdout().flush();
                 elapsed_time = instant.elapsed().as_secs();
                 loop {