[DFDL-WG] Updated Errata doc - Experience 4 doc - with addition to Erratum 5.32

Per recent email threads - another place was found that needed the same change as detailed in Erratum 5.32, so that was just augmented to also specify the same change. (The issue of nil representation being empty string requires %ES; or %WSP*; alone. (The latter having been omitted in now two identified places.) Mike Beckerle | OGF DFDL Workgroup Co-Chair | Tresys Technology | www.tresys.com Please note: Contributions to the DFDL Workgroup's email discussions are subject to the OGF Intellectual Property Policy <http://www.ogf.org/About/abt_policies.php>