Update NEWS for 2.28.4
diff --git a/NEWS b/NEWS
index 2bccccb..c29f63b 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,22 @@
+Overview of Changes from GLib 2.28.3 to 2.28.4
+==============================================
+
+* Improve documentation of GSettings vendor override files
+
+* Translation updates:
+ French
+ Galician
+ German
+ Gujarati
+ Hungarian
+ Korean
+ Norwegian bokmål
+ Polish
+ Romanian
+ Russian
+ Spanish
+
+
Overview of Changes from GLib 2.28.2 to 2.28.3
==============================================
