Add a link to instructions for getting zone_id (#206)

This adds a link to instructions for getting `zone_id`.

Co-authored-by: Sohei Okamoto <[email protected]>

Author: soheiokamoto

products/logs/src/content/logpush/logpush-configuration-api/understanding-logpush-api.md

@@ -9,7 +9,8 @@ order: 61
 
 The table below summarizes the job operations available.
 
-The `<zone>` argument is the zone id (hexadecimal string). The `<job>` argument is the numeric job id. The `<dataset>` argument indicates the log category (either `http_requests`, `spectrum_events`, or `firewall_events`).
+The `<zone_id>` argument is the zone id (hexadecimal string), which can be found using [API's zones endpoint](https://api.cloudflare.com/#getting-started-resource-ids).
+The `<job>` argument is the numeric job id. The `<dataset>` argument indicates the log category (either `http_requests` or `spectrum_events`).
 
 <TableWrap>