Update govuk-prototype-components dependency

components/header/_header.scss

@@ -2,6 +2,14 @@
 // See: https://github.com/alphagov/govuk-design-system/blob/master/src/stylesheets/components/_header.scss
 
 @include govuk-exports("app-header") {
+  .app-header--full-width-border {
+    border-bottom: $govuk-border-width-wide solid $govuk-brand-colour;
+  }
+
+  .app-header--no-border {
+    border-bottom: 0;
+  }
+
   // Override the default 33% width on the logo in GOV.UK Frontend (prevents
   // unnecessary wrapping of product name on smaller tablet / desktop
   // viewports)

components/header/template.njk

@@ -1,5 +1,9 @@
 {%- from "../site-search/macro.njk" import appSiteSearch -%}
-<header class="govuk-header app-header" role="banner" data-module="govuk-header">
+{%- set headerType = "no-border" if
+  layout == "product" or
+  layout == "collection"
+-%}
+<header class="govuk-header app-header{% if headerType %} app-header--{{ headerType }}{% endif %}" role="banner" data-module="govuk-header">
   <div class="govuk-header__container govuk-width-container app-header__container">
     <div class="govuk-header__logo app-header__logo">
       <a href="{{ params.homepageUrl | default("/") }}" class="govuk-header__link govuk-header__link--homepage">

layouts/base.njk

@@ -29,7 +29,7 @@
 {% from "components/document-header/macro.njk" import appDocumentHeader %}
 {% from "components/document-list/macro.njk" import appDocumentList %}
 {% from "components/footer/macro.njk" import appFooter %}
-{% from "components/header/macro.njk" import appHeader %}
+{% from "components/header/macro.njk" import appHeader with context %}
 {% from "components/prose-scope/macro.njk" import appProseScope %}
 
 {% block headIcons %}

layouts/product.njk

@@ -2,7 +2,6 @@
 
 {% block main %}
   {{ xGovukMasthead({
-    classes: "x-govuk-masthead--large",
     title: {
       html: title | smart
     } if title,

package.json

@@ -57,7 +57,7 @@
     "@11ty/eleventy-plugin-rss": "^1.1.2",
     "@rollup/plugin-commonjs": "^25.0.0",
     "@rollup/plugin-node-resolve": "^15.0.0",
-    "@x-govuk/govuk-prototype-components": "^2.2.0",
+    "@x-govuk/govuk-prototype-components": "^3.0.0",
     "deepmerge": "^4.2.2",
     "govuk-frontend": "^5.0.0",
     "luxon": "^3.0.1",