Update README.md

Moving from SDK 3.36.1 to the latest (3.47.1) to fix a bug determining the api name when a demo has `api_name=False`
The bug is affecting gradio_client version 0.2.7, that is installed together with gradio 3.36.1. It was fixed in gradio_client version 0.2.9

See discussion here for more details:
https://huggingface.co/spaces/huggingface-course/audio-course-u7-assessment/discussions/9

README.md

@@ -4,7 +4,7 @@ emoji: 😻
 colorFrom: pink
 colorTo: gray
 sdk: gradio
-sdk_version: 3.36.1
+sdk_version: 3.47.1
 app_file: app.py
 pinned: false
 ---