Diagram error in "Detailed description"

The Mermaid diagram in the documentation page "[Detailed description](https://mkdocs-mermaid2.readthedocs.io/en/latest/description/)" now displays error messages instead of text.

(Possibly connected to #108)



<img width="610" alt="Error message" src="https://github.com/user-attachments/assets/182f0809-957c-408b-869d-f7fe91929675">
