use taghelper for creating h1,h2

Author: yzhoubk

Gemfile.lock

@@ -524,6 +524,7 @@ PLATFORMS
   aarch64-linux
   arm64-darwin-22
   x86_64-darwin-22
+  x86_64-darwin-24
   x86_64-linux
   x86_64-linux-musl
 

app/views/layouts/blacklight/base.html.erb

@@ -47,7 +47,10 @@
         <%= render partial: 'shared/header_navbar' %>
         <main id="main-container" class="<%= container_classes %>" role="main" aria-label="<%= t('blacklight.main.aria.main_container') %>">
             <span class="constraints-label sr-only visually-hidden"><%= t('blacklight.search.filters.title') %></span>
-            <%= content_for(:container_header)? content_for(:container_header) : "<div class='sr-only visually-hidden-focusable'> <h1> Main Content </h1><h2> Content Section </h2></div>".html_safe %>
+            <%= content_tag(:div, class: "sr-only visually-hidden-focusable") do
+                content_tag(:h1, "Main Content") +
+                content_tag(:h2, "Section Content")
+            end %>
             <%= render partial: 'shared/flash_msg', layout: 'shared/flash_messages' %>
 
             <div class="row">