GIT_SILENT Update Appstream for new release

org.kde.kbruch.appdata.xml

@@ -338,10 +338,10 @@ SPDX-License-Identifier: CC0-1.0
     <binary>kbruch</binary>
   </provides>
   <releases>
+    <release version="21.08.3" date="2021-11-04"/>
     <release version="21.08.2" date="2021-10-07"/>
     <release version="21.08.1" date="2021-09-02"/>
     <release version="21.08.0" date="2021-08-12"/>
-    <release version="21.04.3" date="2021-07-08"/>
   </releases>
   <content_rating type="oars-1.1"/>
 </component>