fix: resolve issue with footer menu items not displaying (#169)

Resolve issue with footer menu items not displaying

/kind bug

Fixes #168 

```release-note
修复页脚菜单项名称可能不显示的问题。
```

templates/modules/footer.html

@@ -105,7 +105,7 @@
               <a
                 th:href="@{${menuItem.status.href}}"
                 class="transition-all hover:text-gray-900 hover:underline dark:hover:text-white"
-                th:text="${menuItem.spec.displayName}"
+                th:text="${menuItem.status.displayName}"
               ></a>
             </li>
           </ul>