Retitle request to go live submission page

`<h1>`s should be unique across the site. This page’s `<h1>` matches
that of the previous page (the one with the checklist).

This commit re-titles it to:
- be unique
- more accurately describe the content of the page

app/templates/views/service-settings/submit-request-to-go-live.html

@@ -6,12 +6,12 @@
 {% from "components/banner.html" import banner_wrapper %}
 
 {% block service_page_title %}
-  Request to go live
+  How do you plan to use Notify?
 {% endblock %}
 
 {% block maincolumn_content %}
 
-      <h1 class="heading-large">Request to go live</h1>
+      <h1 class="heading-large">How do you plan to use Notify?</h1>
 
       <form method="post" class="top-gutter">
         {{ checkbox_group('What kind of messages will you be sending?', [