Update app.py

app.py

@@ -64,7 +64,7 @@ user_inputs = {
     "user_direction" : user_direction,
     "exclusions": exclusions,
     "serving_size": serving_size,
-    "difficulty": difficulty_dictionary['selected_difficulty']['gpt_instruction']
+    "difficulty": difficulty_dictionary[selected_difficulty]['gpt_instruction']
 }