use %sylius_admin.path_name% for admin route

Author: jbcr

src/Resources/config/routing.yml

@@ -1,6 +1,6 @@
 bitbag_sylius_cms_plugin_admin:
     resource: "@BitBagSyliusCmsPlugin/Resources/config/routing/admin.yml"
-    prefix: /admin
+    prefix: '/%sylius_admin.path_name%'
 
 bitbag_sylius_cms_plugin_shop:
     resource: "@BitBagSyliusCmsPlugin/Resources/config/routing/shop.yml"