Small content updates

app/views/transition_checker_requests/_request_details.html.erb

@@ -1,6 +1,6 @@
 <div class="alert alert-info">
   <p>
-    Use this form to request an update to the new rules in 2021 checker.
+    Use this form to request a change to the tool for helping people find out how to get ready for new rules in 2021.
     https://www.gov.uk/transition-check
   </p>
   <p>
@@ -32,7 +32,7 @@
   <%= f.input(
     :change_link_to,
     label: "Change link to",
-    hint: "If the link to the relevant service or guidance has changed, provide the new link",
+    hint: "If the link to the relevant service or guidance has changed, provide the new link.",
     input_html: { class: "input-md-6" },
   ) %>
 </div>