ISTWCMS-4529 Give assign roles permissions to the site owner role

config/install/user.role.uw_role_site_owner.yml

@@ -19,6 +19,7 @@ permissions:
   - 'administer shortcuts'
   - 'administer users'
   - 'administer uw-menu-audience-menu menu items'
+  - 'assign roles'
   - 'can override my_dashboard dashboard'
   - 'can view my_dashboard dashboard'
   - 'create and edit custom blocks'