Update userguide/aviate/what_is_aviate.adoc

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: sbrossie

userguide/aviate/what_is_aviate.adoc

@@ -7,6 +7,6 @@ Aviate is designed to deliver a seamless billing experience that builds upon the
 
 == Aviate Plugin
 
-The Aviate plugin extends Kill Bill with additional endpoints as described in the *Aviate section* below. The plugin is available for users who have subscribed to our Flock plan, and it is also installed by default on our `sandbox` deployment available from https://aviate.killbill.io[aviate.killbill.io].
+The Aviate plugin extends Kill Bill with additional endpoints. These endpoints are described in the *Aviate section* below. The plugin is available to users who have subscribed to our Flock plan, and it is installed by default on our `sandbox` deployment at https://aviate.killbill.io[aviate.killbill.io].
 
 Please refer to the documentation below to start integrating Aviate into your Kill Bill environment.