AsssitantDeleted Typo in spec -> generated file

[rgbkrk]

While working with the types from openai.types.beta I noticed that there's one too many s in AssistantDeleted:

https://github.com/openai/openai-python/blob/e0aafc6c1a45334ac889fe3e54957d309c3af93f/src/openai/types/beta/asssitant_deleted.py#L10C11-L10C11

I'd make a PR, but this looks like its autogenerated from an OpenAPI Schema.

[RobertCraigie]

Yes sorry about that, this has been fixed and will be released soon. #694