[gimp-web] content: forgotten gimp_procedure_dialog_fill_expander() in news.

[Jehan <jehanp src gnome org>]

commit 77a6bc414d65366c56beacfa59c318f213ed8a54
Author: Jehan <jehan girinstud io>
Date:   Mon Oct 18 21:52:03 2021 +0200

    content: forgotten gimp_procedure_dialog_fill_expander() in news.
    
    This new function was also added to the API, along with a new
    preferences setting (I hesitated to add more text about this new
    setting, but I guess mentionning it with the new function could be
    enough to keep the news light?).

 content/news/2021/2021-10_GIMP-2.99.8_Released/index.md | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/content/news/2021/2021-10_GIMP-2.99.8_Released/index.md 
b/content/news/2021/2021-10_GIMP-2.99.8_Released/index.md
index 0dd97c02..2e638db4 100644
--- a/content/news/2021/2021-10_GIMP-2.99.8_Released/index.md
+++ b/content/news/2021/2021-10_GIMP-2.99.8_Released/index.md
@@ -150,8 +150,12 @@ plug-in developers got the following improvements:
 
 - New `gimp_display_present()` function to present a specific display at
   the top of the image display stack.
-- New `gimp_procedure_dialog_fill_expander()` to create a `GtkExpander`
-  in procedure dialogs.
+- New `gimp_export_thumbnail()` function to query the user settings (new
+  settings added in "*Image Import & Export*" page of Preferences in
+  this version) on whether or not a file plug-in should export the image
+  thumbnail.
+- New `gimp_procedure_dialog_fill_expander()` function to create a
+  `GtkExpander` in procedure dialogs.
 - All widgets within a same container in a `GimpProcedureDialog` are added
   to their own `GtkSizeGroup` for better aligned generated dialog, yet
   only within their own level of widgets.