Prepare CHANGES.rst for the next release

* if the changes are tracked as they are made, it's less likely that
  anything is missed on release and it's less tedious

CHANGES.rst

 ..
-    Copyright (C) 2020-2024 TU Wien.
+    Copyright (C) 2020-2025 TU Wien.
 
     Invenio-Theme-TUW is free software; you can redistribute it and/or
     modify it under the terms of the MIT License; see LICENSE file for more
@@ -8,6 +8,13 @@
 Changes
 =======
 
+
+Version <next>
+
+- Update user welcome text template
+- Add tombstone page for Derek
+
+
 Version 2024.3 (released 2024-10-01, updated 2024-11-29)
 
 - Replace `setuptools` with `hatchling` as build system