refactor: adjust f-u release version history

backend/backend/config/f-u/version-history/2.4.0.de.md

@@ -1,4 +1,4 @@
-# Goethe-Uni App 3.1
+# Goethe-Uni App 2.4
 
 Wir freuen uns euch mehr in der Goethe-Uni App
 bieten zu können.

backend/backend/config/f-u/version-history/2.4.0.en.md

@@ -1,4 +1,4 @@
-# Goethe-Uni App 3.1
+# Goethe-Uni App 2.4
 
 The Goethe-Uni App got even better!
 

backend/backend/config/f-u/version-history/index.js

@@ -4,7 +4,7 @@ import {versions} from '../../default/tools/version.js';
 /** @type {import('@openstapps/core').SCAppVersionInfo[]} */
 const versionHistory = await versions(
   {
-    '3.1.0': {},
+    '2.4.0': {},
   },
   import.meta.url,
 );