Issue with OpenAPI in Netbox 3.6.4

[computercolin]

This fantastic library seems to not be working in some newer versions of NetBox. The call to fetch OpenAPI definitions fails on our instance.

Specifically
https://github.com/timeforplanb123/anac/blob/e8389895f6a8e43bc1678f8f3bc5bcd90bfed180/anac/core/api.py#L58C1-L58C1

I have to admit, I have not done the work to see if this endpoint has changed, or what possible solutions exist. I thought I would at least create an issue in case this tiny pointer can be of use.

Otherwise, thanks for your library!