Update app.py

app.py

@@ -464,7 +464,7 @@ def generate_text (prompt, chatbot, history, rag_option, model_option, openai_ap
                 result = resulti.strip()
             else:
                 data = {"inputs": prompt, "options": {"max_new_tokens": max_new_tokens},}
-                response = requests.post(API_URL, headers=headers, json=data)
+                response = requests.post(API_URL, headers=HEADERS, json=data)
                 result = response.json()