Update app.py

app.py

@@ -44,9 +44,9 @@ difficulty_dictionary = {
 selected_difficulty = st.radio(
     "Choose a difficulty level for your recipe.",
     [
-        difficulty_dictionary[0], 
-        difficulty_dictionary[1], 
-        difficulty_dictionary[2]
+        list(difficulty_dictionary.keys())[0], 
+        list(difficulty_dictionary.keys())[1], 
+        list(difficulty_dictionary.keys())[2]
     ],
     captions = [
         difficulty_dictionary["Quick & Easy"]["description"],