<!-- Please ensure you have read [documentation](https://docs.rsshub.app/en), and provide all the information required by this template. Otherwise the issue will be closed immediately. Due to the anti-crawling of the source website, some RSS of the demo will return status code 403. Please do not repeat the issue. --> ### Involved route zhihu ### What is expected? it shows the video info correctly. ### What is actually happening? it didn't show the video info. ### Self-deployed information <!-- Delete this section if you are using [RSSHub demo](https://rsshub.app). Please ensure you have deployed the [master branch](https://github.com/DIYgod/RSSHub/tree/master) of RSSHub. --> | Env | Value | | ------------------ | ------------- | | OS | | | Node version | | | if Docker, version | | ### Additional info (logs errors etc)   [rss](https://rsshub.app/zhihu/people/activities/su-fei-17?filter_title=%E5%8F%91%E5%B8%83%E4%BA%86%E6%83%B3%E6%B3%95)
