fix: misc

src/_includes/partials/header.liquid

@@ -1,4 +1,4 @@
-<div class="main__title">
+<section class="main__title">
   <h1>
     {% if page.url != '/' %}
     <a href="/">{{ meta.siteName }}</a>
@@ -7,4 +7,4 @@
     {% endif %}
   </h1>
   {% render "partials/nav/menu.liquid", page:page, nav:nav %}
-</div>
+</section>

src/_includes/partials/nav/menu.liquid

@@ -1,5 +1,5 @@
 <nav
-  class="menu--primary flex--centered flex--wrap justify--center"
+  class="menu__primary flex--centered flex--wrap justify--center"
   aria-label="Primary site navigation">
   {% for link in nav.menu %}
     {% render "partials/nav/link.liquid", page:page, link:link.name, icon:link.icon %}