Incorrect comment and missing parameter in OpenAiAudioApi and OpenAiApi constructors

[inpink]

1. Incorrect comment in OpenAiAudioApi
   The constructor’s comment incorrectly refers to creating a chat completion API instead of an audio API.

2. Missing @param in OpenAiApi
   The @param for webClientBuilder is missing in the constructor’s comment.

I would like to fix this and submit a PR.

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Resolves #1330
Please take a look when you have time. Thank you!