doc: how to get id for record import (#1004)

* doc: how to get id for record import

* Use note and add API docs link.

---------

Co-authored-by: Andrew Starr-Bochicchio <andrewsomething@users.noreply.github.com>
Co-authored-by: Andrew Starr-Bochicchio <a.starr.b@gmail.com>

docs/resources/record.md

@@ -70,3 +70,5 @@ Records can be imported using the domain name and record `id` when joined with a
 ```
 terraform import digitalocean_record.example_record example.com,12345678
 ```
+
+~>  You find the `id` of the records [using the DigitalOcean API](https://docs.digitalocean.com/reference/api/api-reference/#operation/domains_list_records) or CLI. Run the follow command to list the IDs for all DNS records on a domain: `doctl compute domain records list <domain.name>`