GIT_SILENT Update Appstream for new release

src/data/org.kde.kontact.appdata.xml

@@ -434,9 +434,9 @@
   </provides>
   <content_rating type="oars-1.1"/>
   <releases>
+    <release version="5.17.0" date="2021-04-22"/>
     <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"/>
   </releases>
 </component>