Spring-ai Incorrect comment and missing parameter in OpenAiAudioApi and OpenAiApi constructors

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.

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