[gimp] desktop: sync AppData file with `gimp-2-10` branch.

[Jehan <jehanp src gnome org>]

commit 7f303b3787f3f9b2d76226842bb664d330a437ab
Author: Jehan <jehan girinstud io>
Date:   Sat Oct 17 11:08:43 2020 +0200

    desktop: sync AppData file with `gimp-2-10` branch.
    
    Both files should always be synchronized (as development branch will one
    day continue on the 2.10 series). Best practice would be that any change
    to the AppData is first done on `master`, then cherry-picked to
    `gimp-2-10` (even for stable release metadata).

 desktop/org.gimp.GIMP.appdata.xml.in.in | 29 ++++++++++++++++++++++-------
 1 file changed, 22 insertions(+), 7 deletions(-)
---
diff --git a/desktop/org.gimp.GIMP.appdata.xml.in.in b/desktop/org.gimp.GIMP.appdata.xml.in.in
index 91f66f3426..67e81dff5d 100644
--- a/desktop/org.gimp.GIMP.appdata.xml.in.in
+++ b/desktop/org.gimp.GIMP.appdata.xml.in.in
@@ -73,28 +73,43 @@
   </provides>
 
   <releases>
-    <release version="2.10.22" date="TODO">
-      <url type="details">https://www.gimp.org/news/2020/08/TODO/gimp-2-10-22-released/</url>
+    <release version="2.10.22" date="2020-10-04">
+      <url type="details">https://www.gimp.org/news/2020/10/04/gimp-2-10-22-released/</url>
       <description>
         <_p>
-          Mostly a bug-fix release with some maintenance updates:
+          GIMP 2.10.22 is mainly a bug fix release. Notable changes:
         </_p>
         <ul>
           <_li>
-            Foreground Select tool default engine is now Matting Levin
+            HEIF support improvements: optional exporting with high bit depth,
+            AVIF importing and exporting
           </_li>
           <_li>
-            Various file plug-in fixes for PSD, TIFF, WebP, DDS…
+            Multiple improvements in Corel PaintShop Pro support
           </_li>
           <_li>
-            New progressive performance logs and dashboard updates
+            "Sample merged" now available in GEGL operation tool options
+          </_li>
+          <_li>
+            "Sample merged" is now enabled by default for color picking
+          </_li>
+          <_li>
+            The option enabling OpenCL support has been moved to the
+            Playground tab in Preferences
           </_li>
           <_li>
-            OpenCL settings moved to Playground preferences
+            Matting Levin is now the default engine of Foreground Select
+            tool as it performs a lot better
+          </_li>
+          <_li>
+            New progressive performance logs and dashboard updates
           </_li>
           <_li>
             Verbose debug now shows Flatpak info when relevant
           </_li>
+          <_li>
+            Various bug fixes
+          </_li>
         </ul>
       </description>
     </release>