fix: use 'api.TranscribeFromFile' instead of 'api.Transcribe' (#4)

This is a temporary fix as the 'api.Transcribe' function is not working correctly. Further investigation is required, which I don't have time for at the moment. Details of the problem are described in #4

main.go

@@ -63,7 +63,7 @@ func main() {
 	}
 
 	e.POST("/v1/audio/transcriptions", func(c echo.Context) error {
-		return api.Transcribe(c, whisperState)
+		return api.TranscribeFromFile(c, whisperState)
 	})
 
 	address := fmt.Sprintf("127.0.0.1:%d", args.Port)