Update main.py

main.py

@@ -97,7 +97,7 @@ def handle_message(event):
             prompt = event.message.text
             # Combine the PDF contents and the new prompt into a single list for the 'contents' argument
             completion = client.models.generate_content(
-                                model="gemini-2.5-flash",
+                                model="gemini-2.0-flash",
                                 contents=[pdf_content, prompt],
                                 config=generation_config).text
             # 檢查生成結果是否為空