Unfavorite asset

curl --request POST \
  --url https://api.fal.ai/v1/assets/unfavorite \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "vector_id": "b1a2b4a5-cb89-51dc-a108-6dbfd8e742fc"
}
'

{
  "is_favorited": false
}