style(header.html): 头部间隙调整

public/themes/website/1/zh/demo/components/header.html

@@ -164,7 +164,7 @@
         <nav class="site-header__nav" aria-label="主导航">
             <ul>
                 <!-- 首页 -->
-                <li><a href="/" class="is-active">首页</a></li>
+                <li class="site-header__nav-item"><a href="/" class="is-active">首页</a></li>
 
                 <li class="site-header__nav-item site-header__nav-item--mega">
                     {hcTaglib:category id="333" item="vo"  field="*"}