PP-13865 Update product-page footer to new design

With this change we are removing the newsletter link and changing the About
section title.

Author: marcotranchino

source/layouts/layout.html.erb

@@ -99,13 +99,12 @@
       <div class="govuk-width-container">
         <div class="govuk-footer__navigation">
           <%
-        { 'About' =>
+        { 'About GOV.UK&nbsp;Pay' =>
             {
               'Get started' => 'getstarted',
               'Using GOV.UK&nbsp;Pay' => 'using-govuk-pay',
               'Roadmap' => 'roadmap',
-              'Performance' => 'performance',
-              'Newsletter' => 'https://docs.google.com/forms/d/e/1FAIpQLSdJRj0asGOu3VJZ-0UPmx0T6w7FMsdduRAS51k18TS2XlNC7w/viewform'
+              'Performance' => 'performance'
             },
           'Support' =>
             {