Can't resolve $ref at [...] custom_attributes

[hyldmo]

Seems to be caused by #194, previous commits works file. Present for all versions i tested with 2.9, 2.10, 2.11, 2.12

Trying to run codegeneration with openapi-typescript fails with the following error

openapi-typescript --default-non-nullable false https://raw.githubusercontent.com/intercom/Intercom-OpenAPI/refs/heads/main/descriptions/2.11/api.intercom.io.yaml
✨ openapi-typescript 7.6.1
 ✘  Can't resolve $ref at #/components/schemas/update_conversation_request/properties/custom_attributes
 ✘  Can't resolve $ref at #/components/schemas/create_phone_switch_request/properties/custom_attributes