erp5_officejs: avoid to uninstall Web Illustration

Web Illustration was duplicated in erp5_officejs and erp5_dms before nexedi/erp5@c838767b.

After being removed, update erp5_officejs will uninstall this portal type

/reviewed-on nexedi/erp5!783

bt5/erp5_officejs/bt/template_keep_path_list

+portal_types/Web Illustration
\ No newline at end of file