Minor errors in spec

[jjttjj]

Logging these here in case they are useful.
These apply to the latest https://app.stainless.com/api/spec/documented/openai/openapi.documented.yml

• The chatCompletetions operation returns CreateChatCompletionResponse. When actually making a streaming request, the last SSE event will have the data "[DONE]". There is a corresponding DoneEvent in the schemas, but this is not indicated in spec as a possible response to chatCompletions.
• The downloadFile operation only lists a "application/json" response type, but in practice the actual response is always an "application/octet-stream"