update admin log retention (#17908)

Author: ranbel

src/content/docs/cloudflare-one/insights/logs/index.mdx

@@ -20,7 +20,7 @@ Cloudflare Zero Trust logs are stored for a varying period of time based on the
 
 | | Free | Standard | Access | Gateway | Enterprise |
 | ----| ------ | ------ | ------ | ------ | -------- |
-| **Admin logs** | 24 hours | 30 days | 30 days | 30 days | 30 days | 180 days |
+| **Admin logs** | 18 months | 18 months | 18 months | 18 months | 18 months | 18 months |
 | **Access logs** | 24 hours | 30 days | 30 days | 24 hours | 180 days |
 | **DNS logs** | 24 hours | 30 days | 24 hours | 30 days | 180 days<sup><a href="#footnote-1">1</a></sup> |
 | **Network logs** | 24 hours | 30 days | 24 hours | 30 days | 30 days |