Add phrase to fellowship start email.

templates/email/fellows/email_fellow_fellowship_start.html

 <p>Dear {{ object.contributor.get_title_display }} {{ object.contributor.user.last_name }},</p>
 <p>Many thanks for accepting to become an Editorial Fellow at SciPost! We wish you a very warm welcome, and very much appreciate your willingness to help out.</p>
-<p>Your account has now been given Fellow-level rights, so you now have access to a few additional Fellows-only pages. This email is meant as a quick helper to make sure everything is set up properly, and to help you start finding your way around our systems.</p>
+<p>Your account has now been given Fellow-level rights, so you now have access to a few additional Fellows-only pages. We have also included you in our list of Fellows at our <a href="https://scipost.org{% url 'colleges:colleges' %}">Colleges page</a>.</p>
+<p>This email is meant as a quick helper to make sure everything is set up properly, and to help you start finding your way around our systems.</p>
 <h3>Making sure your data is correct</h3>
 <p>From your <a href="https://scipost.org{% url 'scipost:personal_page' %}">personal page</a>, please have a look at the basic information associated to your account (in particular, your areas of specialization). If necessary, please update the data by following the "Update your personal data" link.</p>
 <p>Though we do not require it, we greatly encourage you to use our two-factor authentication setup (see <a a href="https://scipost.org{% url 'scipost:totp' %}">this link</a>) to ensure that your account is robust against hacking attempts.</p>