`src/Command/GeoIpCommand.php`: Make `$defaultName` public

[alexmerlin]

Feature Request

https://github.com/symfony/symfony/blob/7.3/src/Symfony/Component/Console/Command/Command.php#L60
Starting from version 7.3, symfony/console has deprecated the getDefaultName method in Symfony\Component\Console\Command\Command

To avoid using the deprecated method, Dotkernel Admin needs to list the geoip:synchronize command by its $defaultName in config/autoload/cli.global.php
For this, we need to change the property's visibility from protected to public.

Q	A
New Feature	yes
RFC	no
BC Break	no