Changelog (https://github.com/symfony/var-dumper/compare/v7.1.0-BETA1...v7.1.0-RC1)

• bug symfony/symfony#54925 [VarDumper]  adapt namespace changes for new DOM extension classes (@xabbuh)
• bug symfony/symfony#54850 [VarExporter] fix ProxyHelper::generateLazyProxy() when a method returns null (@nikophil)