[gimp/gimp-2-10] NEWS: update.

[Jehan <jehanp src gnome org>]

commit 18d86cccbecc952bfaac16f1173873e4472ffae7
Author: Jehan <jehan girinstud io>
Date:   Wed Feb 13 16:30:17 2019 +0100

    NEWS: update.

 NEWS | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/NEWS b/NEWS
index 312525d5fe..b942cc2d8e 100644
--- a/NEWS
+++ b/NEWS
@@ -62,6 +62,9 @@ User interface:
     better on a particular image.
   - Add basic support for cursors with a scale factor of 2 for HiDPI
     (artwork to be updated).
+  - Foreground and background color icons will now display out-of-gamut
+    warning on indexed images for colors outside of the palette, as well
+    as on grayscale images, for non-gray colors.
 
 Usability: