fix change log structure

Author: mmccool

index.html

@@ -3544,7 +3544,25 @@ <h5>Security Credentials Storage Security and
         </section>
     </section>
 
-    <section id="acknowledgements" class="appendix-acknowledgements">
+    <section id="changes" class="appendix">
+      <h1>Recent Specification Changes</h1>
+      <h2 id="changes-from-first-public-working-draft">Changes from First Public Working Draft</h2>
+      <ul>
+      <li>Revised and expanded use cases.</li>
+      <li>Reorganized requirements.</li>
+      <li>Definition of abstract architecture.</li>
+      <li>Revised and clarified terminology.</li>
+      <li>Additions to implementation and deployments.</li>
+      <li>Addition of security and privacy considerations.</li>
+      </ul>
+      <h2 id="earlier-publications">Earlier Publications</h2>
+      <ul>
+      <li>Sept 2017: <a href="https://www.w3.org/TR/2017/WD-wot-architecture-20170914/">First Public Working Draft</a>.</li>
+      <li>March 2019: Public Working Draft for TAG review.</li>
+      </ul>
+    </section>
+
+    <section id="acknowledgements" class="appendix normative">
         <h1>Acknowledgments</h1>
         <p>Special thanks to Michael McCool, Takuki Kamiya, Kazuyuki Ashimura,  
             Sebastian Käbisch, Zoltan Kis, Elena Reshetova, Ari Keränen, Kazuaki Nimura, Klaus Hartke, and
@@ -3564,23 +3582,5 @@ <h1>Acknowledgments</h1>
            International Workshop on the Web of Things</a>.</p>
     </section>
 
-    <section class="appendix-change-history" class="appendix">
-      <h1>Change History</h1>
-      <h2 id="changes-from-first-public-working-draft">Changes from First Public Working Draft</h2>
-      <ul>
-      <li>Revised and expanded Use Cases.</li>
-      <li>Reorganized requirements.</li>
-      <li>Definition of abstract architecture.</li>
-      <li>Revised and clarified terminology.</li>
-      <li>Additions to implementation and deployments.</li>
-      <li>Addition of security and privacy considerations.</li>
-      </ul>
-      <h2 id="earlier-publications">Earlier Publications</h2>
-      <ul>
-      <li>Sept 2017: <a href="https://www.w3.org/TR/2017/WD-wot-architecture-20170914/">First Public Working Draft</a>.</li>
-      <li>March 2019: Public Working Draft for TAG review.</li>
-      </ul>
-    </section>
-
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