appstream: fix homepage url

app/org.kde.ark.appdata.xml

@@ -333,7 +333,7 @@
       <image width="688" height="553">https://cdn.kde.org/screenshots/ark/ark.png</image>
     </screenshot>
   </screenshots>
-  <url type="homepage">https://kde.org/applications/utilities/ark/</url>
+  <url type="homepage">https://apps.kde.org/ark</url>
   <url type="bugtracker">https://bugs.kde.org/enter_bug.cgi?format=guided&amp;product=ark</url>
   <url type="help">https://docs.kde.org/?application=ark</url>
   <url type="donation">https://www.kde.org/community/donations/?app=ark&amp;source=appdata</url>