Merge pull request segmentio#4972 from segmentio/niallzato-patch-1

Add info on distinct id for identify event

Author: rchinn1

src/connections/destinations/catalog/actions-mixpanel/index.md

@@ -107,7 +107,7 @@ The group id that Mixpanel will use is `12345`.
 
 {% capture identify_user_details %}
 > success ""
-> The below special traits will be mapped to Mixpanel reserved properties automatically to fit Mixpanel's use cases. `traits.created` -> `$created`, `traits.email` -> `$email`, `traits.firstName` -> `$first_name`, `traits.lastName` -> `$last_name`, `traits.name` -> `$name`, `traits.username` -> `$username` and `traits.phone` -> `$phone`.
+> Segment maps the userId set in the identify event to the distinct ID in Mixpanel. Segment also maps the following traits to Mixpanel reserved properties to fit Mixpanel's use cases: `traits.created` -> `$created`, `traits.email` -> `$email`, `traits.firstName` -> `$first_name`, `traits.lastName` -> `$last_name`, `traits.name` -> `$name`, `traits.username` -> `$username` and `traits.phone` -> `$phone`.
 
 {% endcapture %}