404 on sponsor page

### Describe the bug

Hello, I found a 404 on the website. See attached gif

### Reproduction

https://histoire.dev/guide/svelte3/index.html#sponsors

### System Info

```shell
N/A
```

### Used Package Manager

npm

### Validations

- [X] Follow our [Code of Conduct](https://github.com/histoire-dev/histoire/blob/main/CODE_OF_CONDUCT.md)
- [X] Read the [Contributing Guidelines](https://github.com/histoire-dev/histoire/blob/main/CONTRIBUTING.md).
- [X] Read the [docs](https://histoire.dev/guide/).
- [X] Check that there isn't [already an issue](https://github.com/histoire-dev/histoire/issues) that reports the same bug to avoid creating a duplicate.
- [X] Check that this is a concrete bug. For Q&A open a [GitHub Discussion](https://github.com/histoire-dev/histoire/discussions).
- [X] The provided reproduction is a [minimal reproducible example](https://stackoverflow.com/help/minimal-reproducible-example) of the bug.

Open the reproduction URL and review the attached GIF to confirm the 404 on the sponsors section. Trace the source for the /guide/svelte3/index.html#sponsors page, then verify that the sponsors link resolves successfully and the guide no longer shows a 404.

Written by the indexing model from the issue text.