Issue #3247666 by vicheldt, anagomes, joachim, longwave: scaffold README is out of date

core/assets/scaffold/README.txt

 Drupal Scaffold Files are files that are contained inside drupal/core, but are
 installed outside of the core directory (e.g. at the Drupal root).
 
-Scaffold files were added to drupal/core in Drupal 8.8.x. During the Drupal 8
-development cycle, the scaffold files are also being maintained in their original
+For now, the scaffold files are being maintained in their original
 locations. This is done so that Drupal sites based on the template project
-drupal-composer/drupal-project may continue to download these files from the same
-URLs they have historically been found at.
+drupal-composer/drupal-project may continue to download these files from the
+same URLs they have historically been found at.
 
-The scaffold files will be deleted from their original location in Drupal 9.
+Those will be deleted from their original location in a future version.
 See https://www.drupal.org/project/drupal/issues/3075954 for follow-on work.