Update change log for v1.1.0
Update change log for v1.1.0

zorab47/active_admin-sortable_tree,zorab47/activeadmin-sortable-tree,zorab47/activeadmin-sortable-tree,zorab47/active_admin-sortable_tree,zorab47/activeadmin-sortable-tree,zorab47/active_admin-sortable_tree