Update classify endpoint response values

[wujessica]

The following fields in the Classify response are being updated: option -> label confidence -> value

New response:

{
  classifications: {
    /** The input that is being classified. */
    input: string;
    /** The predicted label for the input. */
    prediction: string;
    /** The confidence score for each option. */
    confidences: { label: string; value: number }[];
  }[]
}