Example of expandable chapters

To use the Expandable Chapters function, the SUMMARY.md file must follow the following format:

- [Example of expandable chapters](Capitulo-3/README.md)
    - [Example 1](Capitulo-3/Exemplo-1)
    - [Example 2](Capitulo-3/Exemplo-2)
    - [Example 3](Capitulo-3/Exemplo-3)