Documentation error that I can't fix on my PR

[wudifeixue]

On the Chinese documentation guide page, which is inconsistent with the English one.

• [ ] 1. 常见问题
  On line 13, I have no clue what the correct link should be since I am unfamiliar with the codebase and don't want to guess without checking.
• [ ] 2. using Cache This part I have no clue what the new code should be, seems like after you refactor everything in typescript things moved into new places
• [x] 3.

Rest of the problem I tried my best and made a pull request here: https://github.com/RSSNext/rsshub-docs/pull/7

[KazooTTT]

Hi~ The markdown preview error has been fixed in #11.