Minor fix.

services/webapp/code/rosetta/core_app/templates/register.html

@@ -39,11 +39,11 @@
       Start by clicking on the top-right menu icon.
       {% else %}
 
-      <p><b>Welcome to Rosetta!</b></p>
+      <p><b>Welcome!</b></p>
       
       <p>
       {% if INVITATION_CODE_ENABLED %}
-      We are now in closed beta testing, which means that we can only accept invite-based new users. If you have an invitation code, you can sign up right now. Otherwise, please contact the support to get one.
+      An invitation code is required to register on the platform. If you have one, then you can sign up right now. Otherwise, please get in touch.
       {% else %}
       Enter your email address and choose a password to register on the platform.
       {% endif %}