Fix links (#487)

Some aria-hidden links refer to WAI-ARIA 1.1, not 1.2.

Co-authored-by: Scott O'Hara <[email protected]>

Author: momdo

index.html

@@ -1609,7 +1609,7 @@ <h2 id="docconformance">
               </p>
               <p>
                 <strong>No `aria-*` attributes</strong>
-                except <a data-cite="wai-aria-1.1#aria-hidden">`aria-hidden="true"`</a>.
+                except <a data-cite="wai-aria-1.2#aria-hidden">`aria-hidden="true"`</a>.
               </p>
             </td>
           </tr>
@@ -1628,7 +1628,7 @@ <h2 id="docconformance">
               </p>
               <p>
                 <strong>No `aria-*` attributes</strong>
-                except <a data-cite="wai-aria-1.1#aria-hidden">`aria-hidden="true"`</a>.
+                except <a data-cite="wai-aria-1.2#aria-hidden">`aria-hidden="true"`</a>.
               </p>
               <p>
                 Otherwise, if the `img` has an author defined accessible name,