Update How to vote schema

The [live content has changed](https://www.gov.uk/how-to-vote)

config/machine_readable/how-to-vote.yml

@@ -1,6 +1,6 @@
 title: "How to vote"
 preamble: >
-  <p>You need to <a href="/register-to-vote?src=schema">register to vote</a> before you can vote in UK elections or referendums.</p>
+  <p>You need to be <a href="/register-to-vote?src=schema">registered to vote</a> before you can vote in UK elections or referendums.</p>
   <p>If you’re eligible, you can vote in person on the day of the election at a named polling station. You can also apply for a postal or proxy vote instead.</p>
   <p>There are elections and referendums in England, Scotland and Wales on 6 May 2021.</p>
 
@@ -25,7 +25,7 @@ faqs:
     answer: >
       <p>You can vote when you're:</p>
       <ul>
-        <li>18 years old in England, Wales and Northern Ireland</li>
+        <li>18 years old in England and Northern Ireland</li>
         <li>16 years old in Scottish Parliament and local elections (and other elections when you’re 18)</li>
         <li>16 years old in Welsh Parliament elections (and other elections when you’re 18)</li>
       </ul>
@@ -74,7 +74,7 @@ faqs:
         <li>not being able to vote in person because of work or military service</li>
       </ul>
       <h2 id="how-to-apply-for-a-proxy-vote">How to apply for a proxy vote</h2>
-      <p><a href="/government/collections/proxy-voting-application-forms?src=schema">Apply for a proxy vote</a> using a paper form. You need to send it to your local Electoral Registration Office.</p>
+      <p><a href="/government/collections/proxy-voting-application-forms?src=schema">Apply for a proxy vote</a> using a paper form. You need to send it to your local <a href="/contact-electoral-registration-office?src=schema">Electoral Registration Office</a>.</p>
       <p>Usually, you need to apply for a proxy vote at least 6 working days before election day if you want to vote in England, Scotland or Wales.</p>
 
   - question: Voting from abroad

test/integration/guide_test.rb

@@ -121,7 +121,7 @@ class GuideTest < ActionDispatch::IntegrationTest
 
     assert_equal faq_schema["@type"], "FAQPage"
     assert_equal faq_schema["headline"], "How to vote"
-    assert_equal faq_schema["description"], "<p>You need to <a href=\"/register-to-vote?src=schema\">register to vote</a> before you can vote in UK elections or referendums.</p> <p>If you’re eligible, you can vote in person on the day of the election at a named polling station. You can also apply for a postal or proxy vote instead.</p> <p>There are elections and referendums in England, Scotland and Wales on 6 May 2021.</p>\n"
+    assert_equal faq_schema["description"], "<p>You need to be <a href=\"/register-to-vote?src=schema\">registered to vote</a> before you can vote in UK elections or referendums.</p> <p>If you’re eligible, you can vote in person on the day of the election at a named polling station. You can also apply for a postal or proxy vote instead.</p> <p>There are elections and referendums in England, Scotland and Wales on 6 May 2021.</p>\n"
 
     assert_equal 9, q_and_as.count
   end