GIT_SILENT Update Appstream for new release

mobile/org.kde.kalgebramobile.appdata.xml

@@ -104,9 +104,9 @@
     <value key="KDE::google_play">https://play.google.com/store/apps/details?id=org.kde.kalgebramobile</value>
   </custom>
   <releases>
+    <release version="20.12.3" date="2021-03-04"/>
     <release version="20.12.2" date="2021-02-04"/>
     <release version="20.12.1" date="2021-01-07"/>
     <release version="20.12.0" date="2020-12-10"/>
-    <release version="20.08.3" date="2020-11-05"/>
   </releases>
 </component>

src/org.kde.kalgebra.appdata.xml

@@ -142,9 +142,9 @@
     <binary>kalgebra</binary>
   </provides>
   <releases>
+    <release version="20.12.3" date="2021-03-04"/>
     <release version="20.12.2" date="2021-02-04"/>
     <release version="20.12.1" date="2021-01-07"/>
     <release version="20.12.0" date="2020-12-10"/>
-    <release version="20.08.3" date="2020-11-05"/>
   </releases>
 </component>