PPHA-756: update to privacy policy to include aria on a link (#424)

# What is the change?

Adding aria label to a link in privacy policy

# Why are we making this change?

This makes it more accessible when someone is using a screen reader and
highlights the link

Author: jamiefalcus

lung_cancer_screening/questions/jinja2/privacy_policy.jinja

@@ -127,7 +127,9 @@
       <li>to keep screening services safe and effective</li>
     </ul>
     <p>You can find out more
-      <a href="https://www.england.nhs.uk/contact-us/privacy-notice/nhs-england-as-a-data-controller/#:~:text=Our%20legal%20basis%20for%20using%20patient%20information" target="_blank" rel="noopener">here</a>.</p>
+      <a href="https://www.england.nhs.uk/contact-us/privacy-notice/nhs-england-as-a-data-controller/#:~:text=Our%20legal%20basis%20for%20using%20patient%20information"
+      aria-label="Read more about NHS England’s legal basis for using patient information"
+      target="_blank" rel="noopener">here</a>.</p>
 
     <h3 class="nhsuk-heading-s">8. Your rights and getting help</h3>