docs(cpt): add difference between scw and custom data

Author: nerda-codes

pages/cockpit/faq.mdx

@@ -25,6 +25,8 @@ Refer to the [dedicated documentation page](/cockpit/reference-content/cockpit-l
 
 ## What is the difference between Scaleway and custom data?
 
+[Scaleway data](#scaleway-data) is collected automatically from Scaleway products, while [custom data](#custom-data) is manually pushed from your own sources.
+
 ### Scaleway data
 
 Scaleway data is the observability data (metrics and/or logs) that is natively collected by all [Scaleway products integrated with Cockpit](/cockpit/reference-content/cockpit-limitations/#product-integration-into-cockpit).