Symfony version(s) affected: 5.2.2

Description
when using the role_names attribute in an expression of your access control configuration, warming the cache will fail with an Variable "role_names" is not valid around position... message because the cache warmer expects a roles attribute.

the documentation on this feature also is confusing as the given example uses role_names while the description uses the roles attribute: https://symfony.com/doc/current/security/expressions.html

How to reproduce
add the following in your acces_control config of the security config and run a bin/console cache:clear:

    access_control:
        - { path: '^/', allow_if: "'ROLE_ADMIN' in role_names"}

Possible Solution
change the roles attribute to role_names in the ExpressionCacheWarmer and correct the documentation accordingly.