In Readme, Link to Customizing Block Components takes you to a page with no info on customizing components

The issue is about the documentation of the AppFlowy Editor.
Clicking on a link under Customizing Block Components takes you to a page where there is no information about Customizing Block Components.

Steps to reproduce:

  1. Open AppFlowy Editor Readme in your browser.
  2. Go under the section Customizing Block Components
  3. Click on the link customizing components.
  4. Observe that the new page does not contain any information about Customizing Components

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