[librest] news: added news about restauth and demo

[Günther Wagner <gwagner src gnome org>]

commit 7ea6f82c1e73c9b117c11bab4d455112ace3ef71
Author: Günther Wagner <info gunibert de>
Date:   Tue Feb 1 22:15:44 2022 +0100

    news: added news about restauth and demo

 NEWS | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/NEWS b/NEWS
index 0c6127f..04bc8b1 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,8 @@
+Overview of changes for 0.91
+============================
+* removed RestAuth object
+* added an demo application to showcase librest
+
 Overview of changes for 0.9
 ===========================
 * new oauth2 proxy to accomplish pkce workflow with api endpoints