Add audio speech stream support to readme

Author: tjardoo

README.md

@@ -394,6 +394,9 @@ Learn how to turn audio into text or text into audio.
 
 Generates audio from the input text.
 
+> [!NOTE]
+> This endpoint also has `stream` support. See the [examples/audio/create_speech_stream](https://github.com/tjardoo/openai-client/tree/master/examples/audio/create_speech_stream) example.
+
 ```rust
 use openai_dive::v1::api::Client;
 use openai_dive::v1::resources::audio::{

src/lib.rs

@@ -387,6 +387,9 @@
 //!
 //! Generates audio from the input text.
 //!
+//! > [!NOTE]
+//! > This endpoint also has `stream` support. See the [examples/audio/create_speech_stream](https://github.com/tjardoo/openai-client/tree/master/examples/audio/create_speech_stream) example.
+//!
 //! ```rust
 //! use openai_dive::v1::api::Client;
 //! use openai_dive::v1::resources::audio::{