Update app.py

Revert back to import spaces

app.py

@@ -19,8 +19,8 @@ from tab_teachers_dashboard import create_teachers_dashboard_tab
 from config import CLASS_OPTIONS
 from concurrent.futures import ThreadPoolExecutor
 import tempfile
-#import spaces
-+import spaces
+import spaces
+
 # Load CSS from external file
 with open('styles.css', 'r') as file:
     css = file.read()