Update main.py

main.py

@@ -99,7 +99,7 @@ def handle_message(event):
             prompt = event.message.text
             # gemini-2.5-flash
             completion = client.models.generate_content(
-                                model="gemini-2-flash-preview",
+                                model="gemini-3-flash-preview",
                                 contents=prompt,
                                 config=generation_config).text
             # 檢查生成結果是否為空