Steps to reproduce the issue

Go to
Plugins: Extension - Namespace Updater

Expected result

Text should say:
Automatically builds and updates the administrator/cache/autoload_psr4.php file that is used to autoload extensions.

Actual result

Text actually says:
Automatically builds and updates the libraries/autoload_psr4.php file that is used to autoload extensions.

System information (as much as possible)

Additional comments

autoload_psr4.php has moved