Better error message for expired/invalid PAT

```
$ gh codeql list-versions
expected an object but got: string ("https://docs.github.com/rest")
```

I haven't investigated, but perhaps this is making an invalid API request.

---

EDIT: The reason for the error was an expired PAT. Leaving this issue open so we can provide a better error message in this case.

從 `gh codeql list-versions` 進入點開始，使用已過期或無效的 PAT 重現該命令。追蹤失敗回應的處理方式，並將完成定義為顯示清楚的驗證錯誤，而不是所回報的 object-versus-string 訊息；此 issue 未指定測試或來源檔案。

由索引模型根據 Issue 內容生成。