[ACF 6.8.1 adds support for defining fields](https://www.advancedcustomfields.com/blog/acf-6-8-1-released/#define-field-groups-in-blockjson) in the `block.json` file, but this isn't supported by the schema at [`json/block.json`](https://raw.githubusercontent.com/AdvancedCustomFields/schemas/refs/heads/main/json/block.json).
ACF 6.8.1 adds support for defining fields in the
block.jsonfile, but this isn't supported by the schema atjson/block.json.