Docs for your-first-api found on master are an inconsistent mix of fern and edn

[MageMasher]

Description

The your-first-api documentation on master is a blend of new fern style and the old edn style.

The blend happens in this section https://github.com/cognitect-labs/vase/blob/master/docs/your_first_api.md#building-the-data-model