GIT_SILENT Update Appstream for new release

org.kde.bovo.appdata.xml

@@ -137,10 +137,10 @@
     <binary>bovo</binary>
   </provides>
   <releases>
+    <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"/>
-    <release version="21.08.1" date="2021-09-02"/>
   </releases>
   <content_rating type="oars-1.1"/>
 </component>