Try to fix Windows build case.

src/bin/ngri.rs

@@ -141,6 +141,7 @@ fn main() -> Result<(), BackendError> {
             }
             Err(ReadlineError::Eof) => break,
             Err(ReadlineError::Interrupted) => break,
+            #[cfg(not(windows))]
             Err(ReadlineError::Errno(e)) => {
                 eprintln!("Unknown syscall error: {}", e);
                 break;