Fixed typo while including custom/page_meta.html

.themes/classic/source/_layouts/page.html

@@ -13,7 +13,7 @@ layout: default
   {{ content }}
   {% unless page.footer == false %}
     <footer>
-      <p class="meta">{% include post/meta.html %}{% include custom/page-meta.html %}</p>
+      <p class="meta">{% include post/meta.html %}{% include custom/page_meta.html %}</p>
       {% unless page.sharing == false %}
         {% include post/sharing.html %}
       {% endunless %}