GIT_SILENT Update Appstream for new release

(cherry picked from commit 13d33780)

org.kde.khangman.appdata.xml

@@ -144,10 +144,10 @@
     <binary>khangman</binary>
   </provides>
   <releases>
+    <release version="20.08.3" date="2020-11-05"/>
     <release version="20.08.2" date="2020-10-08"/>
     <release version="20.08.1" date="2020-09-03"/>
     <release version="20.08.0" date="2020-08-13"/>
-    <release version="20.04.3" date="2020-07-09"/>
   </releases>
   <content_rating type="oars-1.1"/>
 </component>