Addition: update allowances for area no href (#360)

closes #325
* update allowances for area no href
* add classes to indicate additions
* update changelog

html-aria/index.html

@@ -337,9 +337,16 @@ <h2 id="docconformance">
             </th>
             <td><a>No corresponding role</a></td>
             <td>
-              <p><strong class="nosupport">No `role`</strong></p>
-              <p><a data-cite="wai-aria-1.1#global_states">Global `aria-*` attributes</a>
-              and any `aria-*` attributes applicable to the allowed roles.</p>
+              <div class="addition proposed">
+                <p>Roles:
+                  <a href="#index-aria-button">`button`</a>
+                  or <a href="#index-aria-link">`link`</a>
+                </p>
+                <p>
+                  <a data-cite="wai-aria-1.1#global_states">Global `aria-*` attributes</a> and
+                  any `aria-*` attributes applicable to the allowed roles.
+                </p>
+              </div>
             </td>
           </tr>
           <tr id="el-article" tabindex="-1">
@@ -4169,7 +4176,7 @@ <h2>Conformance checking requirements</h2>
         A conformance checker MAY define their own terminology, and level or levels of
         severity, when surfacing document failures to conform to this specification.
       </p>
-</section>
+    </section>
     <section id="priv-sec" class="informative">
       <h2>
         Privacy and security considerations
@@ -4185,15 +4192,17 @@ <h2>
       </p>
     </section>
     <section class="informative">
-      <h2>
-        Change log
-      </h2>
+      <h2>Change log</h2>
       <h3>Substantive changes since the last published Recommendation</h3>
 
       <ol reversed>
+        <li>
+          16-Nov-2021:
+          Allow `link` and `button` roles on <a href="#el-area-no-href">`area` without `href`</a>.
+        </li>
         <li>
           26-Oct-2021:
-          Allow `aria-hidden` attribute on the `picture` element. 
+          Allow `aria-hidden` attribute on the <a href="#el-picture">`picture` element</a>. 
         </li>
       </ol>
     </section>