update invites template

Author: gondzo

emails/src/partials/invites.html

@@ -49,7 +49,7 @@
             <tr>
                 <td class="empty-child-one"></td>
                 <td class="second-child" align="center">
-                <a href="https://accounts.topcoder.com/connect/registration?retUrl={{@root.connectURL}}/projects/{{@root.projectId}}">
+                <a href="https://accounts.topcoder.com/connect/registration?retUrl={{@root.connectURL}}/projects/{{projectId}}">
                     Register a Topcoder account to join the project
                 </a>
                 </td>