fix(route/discourse): Replace got with ofetch.

[dzx-dzx]

Involved Issue / 该 PR 相关 Issue

Close #

Example for the Proposed Route(s) / 路由地址示例

/discourse/0/notifications

New RSS Route Checklist / 新 RSS 路由检查表

• New Route / 新的路由
  • Follows Script Standard / 跟随 路由规范
• Anti-bot or rate limit / 反爬/频率限制
  • If yes, do your code reflect this sign? / 如果有, 是否有对应的措施?
• Date and time / 日期和时间
  • Parsed / 可以解析
  • Correct time zone / 时区正确
• New package added / 添加了新的包
• Puppeteer

Note / 说明

[github-actions]

Successfully generated as following:

http://localhost:1200/discourse/0/notifications - Failed ❌

HTTPError: Response code 503 (Service Unavailable)

Error Message:<br/><code class="mt-2 block max-h-28 overflow-auto bg-zinc-100 align-bottom w-fit details">ConfigNotFoundError: Discourse RSS is disabled due to the lack of &lt;a href=&quot;https://docs.rsshub.app/deploy/&quot;&gt;relevant config&lt;/a&gt;</code>
Route: <code class="ml-2 bg-zinc-100">/discourse/:configId/notifications/:fulltext?</code>
Full Route: <code class="ml-2 bg-zinc-100">/discourse/0/notifications</code>
Node Version: <code class="ml-2 bg-zinc-100">v21.7.2</code>
Git Hash: <code class="ml-2 bg-zinc-100">f377d745</code>