Fix scoper.php for FinalClassFixer

[SystematicCZ]

Fixes issue #24 by correcting the scoper.php rule for FinalInternalClassFixer

Scoper output before

❯ grep "private const DEFAULTS" \
  ./ecs-prefixed/vendor/friendsofphp/php-cs-fixer/src/Fixer/ClassNotation/FinalInternalClassFixer.php
    private const DEFAULTS = ['include' => ['internal'], 'exclude' => ['final', 'Entity', 'ECSPrefix202607\ORM\Entity', 'ECSPrefix202607\ORM\Mapping\Entity', 'ECSPrefix202607\Mapping\Entity', 'Document', 'ECSPrefix202607\ODM\Document']];

Scoper output after

❯ grep "private const DEFAULTS" \
  ./ecs-prefixed/vendor/friendsofphp/php-cs-fixer/src/Fixer/ClassNotation/FinalInternalClassFixer.php
    private const DEFAULTS = ['include' => ['internal'], 'exclude' => ['final', 'Entity', 'ORM\Entity', 'ORM\Mapping\Entity', 'Mapping\Entity', 'Document', 'ODM\Document']];

[TomasVotruba]

Looks good, thanks you