GIT_SILENT Update Appstream for new release

(cherry picked from commit 7102c738)

org.kde.elisa.appdata.xml

@@ -202,10 +202,10 @@ SPDX-License-Identifier: CC0-1.0
   <project_group>KDE</project_group>
   <content_rating type="oars-1.0"/>
   <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>
   <custom>
     <value key="KDE::windows_store">https://www.microsoft.com/p/elisa/9pb5md7zh8tl</value>