Fix: Example in config comment includes permission. prefix on wildcard_permission key

[jerrens]

In the permission.php template file, the example in the comments for how to override the WildcardPermission class incorrectly uses permission.wildcard_permission as the key instead of just wildcard_permission.

Developers attempting to point to a custom class who uncomment this line and only update the value will still be using the default provided WildcardPermission class. This config entry is used in src/Traits/HasPermissions.php with the code config('permission.wildcard_permission'...). The convention of the config method is the value before the dot delimiter (permission) is the config file name (permission.php) and the value after the delimiter (wildcard_permission) is the key in the array returned to use. See https://laravel.com/docs/12.x/configuration#accessing-configuration-values for documentation.