change markup to more friendlier language

Author: zacck

emails/receipt.html

@@ -45,7 +45,7 @@
                               <img src="{{high_five_image_url}}" width="100" height="100" />
                             </p>
                             <p class="donation_text center">
-                              <strong>{{user_first_name}}</strong>, thanks for your monthly donation to <a href="{{project_url}}">{{project_title}}</a>.
+                              Hey {{name}}, thanks for your monthly donation to <a href="{{project_url}}">{{project_title}}</a>.
                             </p>
                             <tr>
                               <td class="donation_goal">