update link

campaigns/android/liberate.en.xhtml

@@ -76,7 +76,7 @@
         The F-Droid repository contains details of multiple versions of each
         application. You can also easily create and add own repositories. But
         since the initiative is <a
-        href="https://gitorious.org/f-droid/fdroidserver">very active</a>,
+        href="https://gitlab.com/fdroid/">very active</a>,
         developing in a decentralised fashion and open to collaboration,
         creating own repositories is not really necessary. Its goal is to
         include all useful Free Software Android applications and to keep up