Fix "Add online serving to Stable Audio Diffusion and introduce v1/audio/generate endpoint" (#1794)

Signed-off-by: Ekagra Ranjan <3116519+ekagra-ranjan@users.noreply.github.com>
Signed-off-by: Yueqian Lin <linyueqian@outlook.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Yueqian Lin <70319226+linyueqian@users.noreply.github.com>
Co-authored-by: Yueqian Lin <linyueqian@outlook.com>

docs/.nav.yml

@@ -10,6 +10,7 @@ nav:
       - Image Generation: serving/image_generation_api.md
       - Image Edit: serving/image_edit_api.md
       - Text to Speech: serving/speech_api.md
+      - Audio Generation: serving/audio_generate_api.md
       - Streaming Video Input: serving/video_stream_api.md
   - Examples:
     - examples/README.md