Update app.py

app.py

@@ -348,7 +348,7 @@ def generate_follow_up_question(original_question, current_response, previous_re
                 "Content-Type": "application/json"
             },
             data=json.dumps({
-                "model": "model": "meta-llama/llama-3.2-90b-vision-instruct:free",
+                "model": "meta-llama/llama-3.2-90b-vision-instruct:free",
                 "messages": messages
             })
         )