Add erratum notice.

Author: arthurgleckler

srfi-180.html

@@ -57,6 +57,10 @@ <h2 id="status">Status</h2>
             <li>Draft #2 published: 2020-03-02</li>
             <li>Draft #3 published: 2020-06-20</li>
 	    <li>Finalized: 2020-07-01</li>
+	    <li>Revised to fix errata:
+	      <ul>
+		<li>2016-08-07 (Fix <code>json-generator</code> to accept generators as well as ports.)</li></ul></li>
+
         </ul>
         <h2 id="abstract">Abstract</h2>
         <p>This library describes a JavaScript Object Notation (JSON) parser and printer.  It supports JSON that may be bigger than memory.</p>