[Docs] link exporter 2.x docs
[Docs] link exporter 2.x docs

greg0ire/SonataAdminBundle,sonata-project/SonataAdminBundle,jordisala1991/SonataAdminBundle,greg0ire/SonataAdminBundle,peter-gribanov/SonataAdminBundle,sonata-project/SonataAdminBundle,ARTACK/SonataAdminBundle,peter-gribanov/SonataAdminBundle,ARTACK/SonataAdminBundle,jordisala1991/SonataAdminBundle,osavchenko/SonataAdminBundle,Armstrong1992/SonataAdminBundle,greg0ire/SonataAdminBundle,peter-gribanov/SonataAdminBundle,jordisala1991/SonataAdminBundle,osavchenko/SonataAdminBundle,ARTACK/SonataAdminBundle,Armstrong1992/SonataAdminBundle,osavchenko/SonataAdminBundle,jordisala1991/SonataAdminBundle,ARTACK/SonataAdminBundle,osavchenko/SonataAdminBundle,greg0ire/SonataAdminBundle,peter-gribanov/SonataAdminBundle,osavchenko/SonataAdminBundle