GIT_SILENT Update Appstream for new release

org.kde.kcharselect.appdata.xml

@@ -244,9 +244,9 @@
   </provides>
   <launchable type="desktop-id">org.kde.kcharselect.desktop</launchable>
   <releases>
+    <release version="21.12.2" date="2022-02-03"/>
     <release version="21.12.1" date="2022-01-06"/>
     <release version="21.12.0" date="2021-12-09"/>
     <release version="21.08.3" date="2021-11-04"/>
-    <release version="21.08.2" date="2021-10-07"/>
   </releases>
 </component>