refactor: update max tokens to 512

Author: phodal

src/pages/api/chatgpt/chat.ts

@@ -150,7 +150,7 @@ async function sendMsgs({
       model: "gpt-3.5-turbo",
       messages,
       temperature: 0.5,
-      max_tokens: 200,
+      max_tokens: 512,
     });
     if (response.status !== 200) {
       res.status(response.status).json({ error: response.statusText });