[gimp] NEWS: update.

[Jehan <jehanp src gnome org>]

commit 3d095e5aa4c89a6bf3fd58f71c93c9237de5a1d6
Author: Jehan <jehan girinstud io>
Date:   Fri Oct 15 19:26:20 2021 +0200

    NEWS: update.

 NEWS | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/NEWS b/NEWS
index 8f5cfaef23..1c094a111d 100644
--- a/NEWS
+++ b/NEWS
@@ -121,6 +121,10 @@ Build:
     instead of "x11" to prevent unnecessary X11 access while in Wayland.
   - Fixes to codebase making GIMP 2.99 finally building and running on
     macOS.
+  - Our flatpak manifests now use the flatpak-external-data-checker tool
+    with the Anitya backend allowing to monitor our dependencies and
+    ensure they are always up-to-date. All dependencies have been
+    updated accordingly.
 
 
 Overview of Changes from GIMP 2.99.4 to GIMP 2.99.6