Enhance submission message

jmdc-ui/jmdc_app/templates/submit_thanks.jinja2

 {% extends "jmdc-main.jinja2" %}
 
 {% block content %}
-        <div>Thank you for your submission. Please check your email for the verification link</div>
+        <div>Thank you for your submission. Processing will start as soon as you confirmed your submission by <b>clicking on the verification link we just sent to you by email</b>.</div>
 {% endblock content %}
\ No newline at end of file