500 error when accessing dqlite's documentation website

## Overview

When trying to open dqlite's documentation website at [canonical.com/dqlite/docs](https://canonical.com/dqlite/docs), I get a `500` error code.

## Screenshot

<img width="2560" height="987" alt="Image" src="https://github.com/user-attachments/assets/288a81ed-e98a-4d4c-b371-0245488da54c" />
