fix caps on button

mkt/home/templates/home/home.html

@@ -15,7 +15,7 @@
         {% endtrans %}
       </p>
       <a href="https://wiki.mozilla.org/Marketplace/Mozillian_Preview"
-         class="button arrow" target="_blank">{{ _('Test & Give Feedback') }}</a>
+         class="button arrow" target="_blank">{{ _('Test & give feedback') }}</a>
     </div>
   </section>
   <section id="home-featured" class="featured full">