Change client.lexer to hub.lexer documentation

Author: Stephanie Pruna

source/includes/_content.md

@@ -16,7 +16,7 @@ Unlike traditional APIs, your requests for the Content API must be created from
 
 ### Endpoints
 ```text
-https://clients.lexer.io/api/clients/{account_id}/screens/{screen_id}/charts/{chart_id}/result?client_token={client token}
+https://hub.lexer.io/api/clients/{account_id}/screens/{screen_id}/charts/{chart_id}/result?client_token={client token}
 ```
 Retrieved from each chart in your screen, endpoints look like the example displayed to the right. They always include the account id, screen id, chart id, and your client token. Note that Command screens are designed for public use and can be accessed without authentication.