Merge pull request #199 from afifurrohman-id/eprintln-patch

refactor(examples/ammonia-cat.rs): consider using `eprintln!` to write error to `stderr` instead of `stdout`

examples/ammonia-cat.rs

@@ -29,7 +29,7 @@ fn run() -> io::Result<()> {
 fn main() {
     env_logger::init();
     if let Err(ref e) = run() {
-        println!("error: {}", e);
+        eprintln!("error: {e}");
         process::exit(1);
     }
 }