text: Title: Fix a missing piece in documentation
  Body: **Describe the bug**
  A bit of documentation is not displayed due to a formatting error:
  
  <img width="626" alt="Image" src="https://github.com/user-attachments/assets/db045709-69c0-4169-90bb-212df3b14493" />
  
  Relevant piece of code https://github.com/tortoise/tortoise-orm/blob/develop/docs/index.rst?plain=1#L62
  
  **To Reproduce**
  `make docs`
  