ActivityPub帖子应正确显示日期

[mark.reeves]

理想情况下，所有 Discourse 标签都会被妥善处理（渲染或省略），但我们应该确保日期直接输出：

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Onebox 能很好地渲染日期：

Webinar: Growing and Retaining Your Community

On, 2025-05-20T17:00:00Z (UTC) we explored why people join and stay in communities! Watch the Replay [Why people join and stay in communities] Key Takeaways What is participation, anyway? [Participation - Why People Join and Stay in Communities (1)] [Participation - Why People Join and Stay in Communities] [Participation - Why People Join and Stay in Communities] Key Motivators for Community Participation Getting help or solving a problem/practical need. Connecting with like…

[angus (Angus McLeod)]

谢谢！这将解决这个问题。

FEATURE: Support local dates markdown