added entry in the 'changes' section for protected terms

Author: pchampin

index.html

@@ -12830,7 +12830,9 @@ <h2>Changes since JSON-LD Community Group Final Report</h2>
       This allows a mechanism for documenting the content of a context using HTML.</li>
     <li>A <a>frame</a> may also be located within an HTML document, identified
       using type <code>application/ld+json;profile=http://www.w3.org/ns/json-ld#frame</code>.</li>
-  </ul>
+    <li>Term definitions can now be <a href="#protected-term-definitions">protected</a>,
+      to limit the ability of other contexts to override them.</li>
+    </ul>
 </section>
 
 <section id="ack"