[gdm] NEWS: update for release

[Ray Strode <halfline src gnome org>]

commit 01636b7bdd6b84f25c8ddac5ce3c875c9d7a6e7d
Author: Ray Strode <rstrode redhat com>
Date:   Tue Feb 26 15:15:49 2019 -0500

    NEWS: update for release

 NEWS | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/NEWS b/NEWS
index 04e4ba47..eaaec8f5 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,13 @@
+===============
+Version 3.31.91
+===============
+- Screen lock bypass fix (when timed login is enabled) (CVE-2019-3825)
+- PAM file updates
+- Improved debug logging
+- Keyboard layout fixes
+- Display foreach handling
+- Translation updates
+
 ==============
 Version 3.31.4
 ==============