GIT_SILENT Update Appstream for new release

src/org.kde.korganizer.appdata.xml

@@ -377,9 +377,9 @@
     <binary>korganizer</binary>
   </provides>
   <releases>
+    <release version="5.16.3" date="2021-03-04"/>
     <release version="5.16.2" date="2021-02-04"/>
     <release version="5.16.1" date="2021-01-07"/>
     <release version="5.16.0" date="2020-12-10"/>
-    <release version="5.15.3" date="2020-11-05"/>
   </releases>
 </component>