Update app.py

app.py

@@ -101,7 +101,7 @@ def cleanup_old_files():
     current_time = time.time()
     for folder in [UPLOAD_FOLDER, RESULTS_FOLDER]:
         for file_path in Path(folder).glob('*'):
-            if current_time - file_path.stat().st_mtime > 3600:  # 1 hour
+            if current_time - file_path.stat().st_mtime > 3600:  # 1 hour
                 file_path.unlink()
 
 cleanup_old_files()