Update app.py

app.py

@@ -161,7 +161,7 @@ def game_ui(game_state):
 
     # Show game history
     st.write('# Game History')
-    if not st.checkbox('Show game history')
+    if not st.checkbox('Show game history'):
         if checkbox:
             with open('game_state.txt', 'r') as f:
                 lines = f.readlines()