Adding custom prompt to Whisper voice transcription

customize the prompt used for the Whisper voice transcription, so we can specify custom words or preferred spellings (e.g., use U.S. or U.K. English). I use another service called "Superwhisper" to transcribe for me when i use Typingmind, but if I had the ability to alter the prompt in Typingmind, I'd be able to do simply do this directly without needing to resort to an additional service.