DOCS Fix broken docs hashlink

Fixes #7534

docs/en/04_Changelogs/4.0.0.md

@@ -17,7 +17,7 @@ guide developers in preparing existing 3.x code for compatibility with 4.0
   arrangement of templates, as well as other references to classes via string literals or configuration.
   Automatic upgrading tools have been developed to cope with the bulk of these changes (see
   [upgrading notes](#upgrading)).
-* Object class has been replaced with traits ([details](object-replace)).
+* Object class has been replaced with traits ([details](#object-replace)).
 * Asset storage has been abstracted, and a new concept of `DBFile` references via database column references
   now exists in addition to references via the existing `File` dataobject. File security and protected files
   are now a core feature ([details](#asset-storage))