Update test to include new cleanup log messages in ZIP update scenario

Co-authored-by: swissspidy <841956+swissspidy@users.noreply.github.com>

Author: Copilot

features/core-update.feature

@@ -21,6 +21,8 @@ Feature: Update WordPress core
       """
       Starting update...
       Unpacking the update...
+      Cleaning up files...
+      No old files were removed.
       Success: WordPress updated successfully.
       """