Update speaker verification

curl --request PUT \
  --url https://api.beyondwords.io/v1/organization/voices/{voice_id}/speaker_verification \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "note": "Verified by legal team",
  "consent_statement": {
    "url": "https://example.com/consent.pdf"
  }
}
'

{
  "id": 1,
  "voice_id": 42,
  "note": "Verified by legal team",
  "consent_statement": {
    "url": "https://example.com/consent.pdf"
  },
  "created": "2024-01-01 00:00:00 UTC",
  "updated": "2024-01-01 00:00:05 UTC"
}