[gimp] 2.10.18: update appdata

[Alexandre Prokoudine <aprokoudine src gnome org>]

commit 3a1aec305100ca9909ca8717f11de81d59e4936a
Author: Alexandre Prokoudine <alexandre prokoudine gmail com>
Date:   Fri Feb 21 22:50:05 2020 +0300

    2.10.18: update appdata
    
    (cherry picked from commit 644f14da45747163f2faee47e0098772d6d5dc02)

 desktop/org.gimp.GIMP.appdata.xml.in.in | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)
---
diff --git a/desktop/org.gimp.GIMP.appdata.xml.in.in b/desktop/org.gimp.GIMP.appdata.xml.in.in
index 65da3f812f..bbc4b01317 100644
--- a/desktop/org.gimp.GIMP.appdata.xml.in.in
+++ b/desktop/org.gimp.GIMP.appdata.xml.in.in
@@ -72,8 +72,17 @@
   </provides>
 
   <releases>
+    <release version="2.10.18" date="2020-02-22">
+      <url type="details">https://www.gimp.org/news/2020/02/22/gimp-2-10-18-released/</url>
+      <description>
+        <_p>
+          GIMP 2.10.18 fixes some critical bugs and introduces naive support for
+          CMYK PSD files.
+        </_p>
+      </description>
+    </release>
     <release version="2.10.16" date="2020-02-19">
-      <url type="details">https://www.gimp.org/news/2020/02/14/gimp-2-10-16-released/</url>
+      <url type="details">https://www.gimp.org/news/2020/02/21/gimp-2-10-18-released/</url>
       <description>
         <_p>
           GIMP 2.10.16 delivers several major usability improvements, a new tool