Found broken `/preparation-for-study/app.comflowy.com` link. Please fix!

[workflow-adding-a-model-to-the-scene-Vmce2RLAld8mmJlvCAsy-bear_velvety_77-openart.ai.json](https://github.com/user-attachments/files/18907549/workflow-adding-a-model-to-the-scene-Vmce2RLAld8mmJlvCAsy-bear_velvety_77-openart.ai.json)

Find the broken link '/preparation-for-study/app.comflowy.com' in the documentation files, likely in an MDX file. Search the repository for this path to locate the file. Replace the broken link with the correct URL. Verify the fix by checking the documentation locally or in a preview.

索引モデルが issue の本文から書いたものです。