fix: drop redundant aria-hidden on homepage description rows

Homepage description rows carried aria-hidden="true" on top of hidden, unlike category pages (fixed in 528f9ed); the hidden attribute alone already keeps them from assistive tech while hidden.

Co-Authored-By: Claude <noreply@anthropic.com>

website/templates/index.html

@@ -241,7 +241,7 @@
           <td class="col-arrow"><span class="arrow">&rarr;</span></td>
         </tr>
         {% if entry.description %}
-        <tr class="desc-row" aria-hidden="true" hidden>
+        <tr class="desc-row" hidden>
           <td class="col-num"></td>
           <td colspan="6">
             <div class="desc-text">{{ entry.description | safe }}</div>