adjust the existing changelog fragment instead of creating another one.

Author: lgetwan

changelogs/fragments/lookup_folder.yml

@@ -1,3 +1,4 @@
 breaking_changes:
   - Folder lookup module - Return the complete folder information, not only the extensions.
-    Refer to the module documentation for more details.
+    To adjust your playbooks, you have to use "{{ my_lookup_result.extensions }}" instead of
+    "{{ my_lookup_result }}".