Change wording from "merge" to "intersect"
Change wording from "merge" to "intersect"

Since using the ``--path-mode=intersection`` does not merge the paths in the config file and the paths provided by the command argument and is instead intersecting both (https://github.com/FriendsOfPHP/PHP-CS-Fixer/blob/44f7ac87dbd123edec69f26df670e2c475d0bad8/src/Console/ConfigurationResolver.php#L863) I thought it would be a good idea to change this here to make it more clear.

Slamdunk/PHP-CS-Fixer,FriendsOfPHP/PHP-CS-Fixer,gharlan/PHP-CS-Fixer,kubawerlos/PHP-CS-Fixer,SpacePossum/PHP-CS-Fixer,Slamdunk/PHP-CS-Fixer,gharlan/PHP-CS-Fixer,SpacePossum/PHP-CS-Fixer,FriendsOfPHP/PHP-CS-Fixer,kubawerlos/PHP-CS-Fixer,keradus/PHP-CS-Fixer,keradus/PHP-CS-Fixer