Update changelog

CHANGELOG.rst

@@ -19,6 +19,8 @@ Added
 
 * OpenID Connect RSA keys can now be passed as string in config files
 * Views filtering for person names now also search the username of a linked user
+* OAuth2 applications now take an icon which is shown in the authorization progress.
+* Add support for hiding the main side nav in ``base.html``.
 
 Fixed
 ~~~~~
@@ -40,6 +42,8 @@ Changed
 * [Docker] Base image now contains curl, grep, less, sed, and pspg
 * Views raising a 404 error can now customise the message that is displayed on the error page
 * OpenID Connect is enabled by default now, without RSA support
+* Login and authorization pages for OAuth2/OpenID Connect now indicate that the user is in progress
+  to authorize an external application.
 
 `2.5`_ – 2022-01-02
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