Update the custom trait definition

[vanand17]

What article on segment.com/docs is affected?

https://segment.com/docs/glossary/#custom-trait

What part(s) of the article would you like to see updated?

The custom traits definition here is slightly incorrect which will confuse customers. It can be updated to have the following content

Custom Traits are user or account traits collected from all the identify calls you send to Personas. For example, you can add any trait that you send as a part of your identify calls (email, first_name, last_name) as custom traits. You can then view them in the profile explorer, and use them in your audiences, computed traits and SQL traits.

Additional information

No response