Add the page header to the render context.

src/intermediate/convert.rs

@@ -81,6 +81,7 @@ pub(crate) fn convert_blog_post_page_to_render_context<D: AsRef<Path>, F: AsRef<
 
     let ret = RenderBlogPostPage::new(
         global_settings,
+        Some(page_header),
         page.title.clone(),
         Some(link_to_blog_post),
         children,