GIT_SILENT Update Appstream for new release

(cherry picked from commit 2680966a)

desktop/org.kde.konsole.appdata.xml

@@ -498,10 +498,10 @@
   </provides>
   <update_contact>konsole-devel_AT_kde.org</update_contact>
   <releases>
+    <release version="21.04.1" date="2021-05-13"/>
     <release version="21.04.0" date="2021-04-22"/>
     <release version="20.12.3" date="2021-03-04"/>
     <release version="20.12.2" date="2021-02-04"/>
-    <release version="20.12.1" date="2021-01-07"/>
   </releases>
   <content_rating type="oars-1.1"/>
 </component>