Tweak submission's author guidelines

scipost_django/submissions/templates/submissions/_author_guidelines.html

@@ -9,7 +9,7 @@
   <div class="row">
     <div class="col-lg-5">
       <h4>The following is a quick summary guide to authoring at SciPost.</h4>
-      <p>It is not meant to replace our official rules and other helpful pages, which you will find in the Useful links box next to this menu.</p>
+      <p>It is not meant to replace our official rules and other helpful pages, which you will find in the Useful links box next to this menu (authors must read the SciPost and Journals Terms and Conditions).</p>
       <h4>On this page:</h4>
       <ul>
 	<li><a href="#manuprep">Manuscript preparation</a></li>