Add note on enabling driver input in recording_with_microphone.rst to allow mic recording (#8960)

* Make enable input instruction clearer in recording_with_microphone.rst

tutorials/audio/recording_with_microphone.rst

@@ -12,7 +12,7 @@ A simple demo is included in the official demo projects and will be used as
 support for this tutorial:
 `<https://github.com/godotengine/godot-demo-projects/tree/master/audio/mic_record>`_.
 
-You will need to enable audio input in the project settings, or you'll just get empty audio files.
+You will need to enable audio input in the project settings ``Project Settings -> Audio -> Driver -> Enable Input``, or you'll just get empty audio files.
 
 The structure of the demo
 -------------------------