Add notice about default config to usage prediction (#41135)

source/_integrations/default_config.markdown

@@ -32,6 +32,7 @@ This {% term integration %} is a meta-component and configures a default set of
 - [Simple Service Discovery Protocol (SSDP)](/integrations/ssdp/) (`ssdp`)
 - [Stream](/integrations/stream/) (`stream`)
 - [Sun](/integrations/sun/) (`sun`)
+- [Usage Prediction](/integrations/usage_prediction/) (`usage_prediction`)
 - [USB](/integrations/usb/) (`usb`)
 - [Webhooks](/integrations/webhook) (`webhook`)
 - [Zero-configuration networking (zeroconf)](/integrations/zeroconf/) (`zeroconf`)

source/_integrations/usage_prediction.markdown

@@ -13,3 +13,13 @@ ha_integration_type: system
 ---
 
 The **Usage Prediction** {% term integration %} is an internal integration that provides predictions of what entities the user is most likely to interact with. This is used in the frontend to surface the most relevant entities to the user.
+
+## Configuration
+
+While this integration is part of [`default_config:`](/integrations/default_config/) to enable features in the default experience, it will only be enabled by setting up the configuration flow, or manually adding it to your {% term "`configuration.yaml`" %} file.
+{% include integrations/restart_ha_after_config_inclusion.md %}
+
+```yaml
+# Example configuration.yaml entry
+usage_prediction:
+```