update changelog for #981

Author: Dylan Tack

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [unreleased]
 * Remove support for Django 3.0
 * Add support for Django 3.2
+* #981 redirect_uri is new required in authorization requests when multiple URIs are registered.
 
 ### Added
 * #712, #636, #808. Calls to `django.contrib.auth.authenticate()` now pass a `request`