added link to data sharing agreement (#415)

app/views/start/index.html.erb

@@ -26,8 +26,6 @@
     <p class="govuk-body">Use your account details to sign in.</p>
     <p class="govuk-body">If you need to set up a new account, speak to your organisation’s CORE data coordinator. If you don’t know who that is, <%= govuk_link_to("contact the helpdesk", "https://digital.dclg.gov.uk/jira/servicedesk/customer/portal/4/group/21") %>.</p>
     <p class="govuk-body">You can <%= govuk_link_to("request an account", "https://digital.dclg.gov.uk/jira/servicedesk/customer/portal/4/group/21") %> if your organisation doesn’t have one.</p>
-    <%# TODO: Add link to data sharing agreement %>
-    <p class="govuk-body"><%= govuk_link_to("Read our data sharing agreement", "#") %>.</p>
   </div>
 
   <div class="govuk-grid-column-one-third">
@@ -42,7 +40,7 @@
             <%= govuk_link_to("How to submit social housing lettings and sales data (CORE)", "#", classes: "app-related-navigation__section-link app-related-navigation__section-link--other") %>
           </li>
           <li>
-            <%= govuk_link_to("Data sharing agreement", "#", classes: "app-related-navigation__section-link app-related-navigation__section-link--other") %>
+            <%= govuk_link_to("Data sharing agreement", data_sharing_agreement_path, classes: "app-related-navigation__section-link app-related-navigation__section-link--other") %>
           </li>
         </ul>
       </nav>