pearson registration - synced up link text for emailing edx

lms/templates/test_center_register.html

@@ -474,7 +474,7 @@
     
     <div class="details details-contact">
       <h4>Questions</h4>
-      <p>If you have a specific question pertaining to your registration, you may contact <a class="contact-link" href="${exam_help_href}">exam-help@edx.org</a>.</p>
+      <p>If you have a specific question pertaining to your registration, you may <a class="contact-link" href="${exam_help_href}">contact edX at exam-help@edx.org</a>.</p>
     </div>
   </aside>
 </section>