GIT_SILENT Update Appstream for new release

src/org.kde.kdiamond.appdata.xml

@@ -112,9 +112,9 @@
   </screenshots>
   <project_group>KDE</project_group>
   <releases>
+    <release version="20.08.1" date="2020-09-03"/>
     <release version="20.08.0" date="2020-08-13"/>
     <release version="20.04.3" date="2020-07-09"/>
     <release version="20.04.2" date="2020-06-11"/>
-    <release version="20.04.1" date="2020-05-14"/>
   </releases>
 </component>