Fix webpack usage doc with appropriate _logo.html.twig template
Fix webpack usage doc with appropriate _logo.html.twig template

The file "templates/bundles/SyliusAdminBundle/_logo.html.twig" overrides "src/Sylius/Bundle/AdminBundle/Resources/views/Layout/_logo.html.twig" but only the asset location should change. Currently the documentation suggests to remove all the HTML of the template and to replace it with only the asset path, this is not correct.
Zales0123/Sylius,diimpp/Sylius,diimpp/Sylius,kayue/Sylius,lchrusciel/Sylius,loic425/Sylius,101medialab/Sylius,diimpp/Sylius,Arminek/Sylius,Sylius/Sylius,Arminek/Sylius,mbabker/Sylius,pamil/Sylius,Sylius/Sylius,pjedrzejewski/Sylius,Sylius/Sylius,lchrusciel/Sylius,SyliusBot/Sylius,kayue/Sylius,Zales0123/Sylius,GSadee/Sylius,mbabker/Sylius,101medialab/Sylius,SyliusBot/Sylius,loic425/Sylius,GSadee/Sylius,pamil/Sylius,mbabker/Sylius,SyliusBot/Sylius,pamil/Sylius,antonioperic/Sylius,lchrusciel/Sylius,mbabker/Sylius,pjedrzejewski/Sylius,GSadee/Sylius,pjedrzejewski/Sylius,loic425/Sylius,101medialab/Sylius,antonioperic/Sylius,pjedrzejewski/Sylius,kayue/Sylius,Arminek/Sylius,Zales0123/Sylius,antonioperic/Sylius