GIT_SILENT Update Appstream for new release

org.kde.dolphin-plugins.metainfo.xml

@@ -125,9 +125,9 @@
   </categories>
   <icon type="stock">system-file-manager</icon>
   <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>
 </component>