[Edit docs] Expand references from openapi.yaml

URL of the page to change: https://docs.stacks.co/reference/api#get-v2-accounts-principal
---
Instead of showing:
```
{
  "$ref": "./components/examples/account-data.example.json"
}
```
there should be a way to make it expand the reference and show the actual information here. This is not very helpful as-is.
