Add govuk-body classes to cookie banner content

alphagov/govuk-frontend#2427

app/views/cookies/_banner.html.erb

@@ -5,8 +5,8 @@
         <h2 class="govuk-cookie-banner__heading govuk-heading-m">Cookies on Manage training for early career teachers</h2>
 
         <div class="govuk-cookie-banner__content">
-          <p>We use some essential cookies to make this service work.</p>
-          <p>We’d also like to use analytics cookies so we can understand how you use the service and make improvements.</p>
+          <p class="govuk-body">We use some essential cookies to make this service work.</p>
+          <p class="govuk-body">We’d also like to use analytics cookies so we can understand how you use the service and make improvements.</p>
         </div>
       </div>
     </div>
@@ -29,7 +29,7 @@
       <div class="govuk-grid-column-two-thirds">
 
         <div class="govuk-cookie-banner__content">
-          <p>
+          <p class="govuk-body">
             <span class="js-cookie-message">
               You’ve set your cookie preferences.
             </span>