Amend h1 font-size in manuals to l

Author: CodeSonia

app/views/content_items/manuals/_manual_section_layout.html.erb

@@ -14,7 +14,7 @@
           <div class="govuk-grid-column-full">
             <%= render "govuk_publishing_components/components/heading", {
               text: @content_item.document_heading.join(" - "),
-              font_size: "m",
+              font_size: "l",
               id: "section-title",
               heading_level: 1,
               margin_bottom: 4,

test/integration/manual_section_test.rb

@@ -50,7 +50,7 @@ class ManualSectionTest < ActionDispatch::IntegrationTest
   test "renders document heading" do
     setup_and_visit_manual_section
 
-    within ".govuk-heading-l" do
+    within "#manual-title.govuk-heading-l" do
       assert page.has_text?(@manual["title"])
     end
   end