Add audio_transcribe example for whisper

[ftnext]

Is there anyone who can add whisper example in audio_transcribe.py?

• microphone_recognition example is already added (on #625)
• This test code is helpful to solve this issue

Expected behaviour

We will have audio_transcribe example for whisper!

Actual behaviour

We didn't have the example yet.

[Akshayp02]

interesting could you assign me this issue with short explanation I newly started contributing.