Update a line item

curl -X PUT "https://api.live.paisr.tech/v2/invoices/{invoice_id}/items/{item_id}" \
  -H "Authorization: Bearer <access_token>" \
  -H "User-Agent: MyApp/1.0" \
  -H "Content-Type: application/json" \
  -d '{
  "description": "Invoice item for services rendered",
  "quantity": 1,
  "unit_price": 100
}'

{
  "success": true,
  "message": "Request was successful."
}