Internal references to other paths' examples not resolved.

[jjjasper]

When using the BOAT plugin to generate the API docs, some specs are failing because of the following way to reference examples:
example:
$ref: '#/paths/~1client-api~1v2~1action-recipes/get/responses/401/content/application~1json/example'

The rather ugly ~1 escaped references to another /paths/... are valid openApi. (See https://swagger.io/docs/specification/using-ref/ )