improve wording in submissions history

scipost_django/submissions/templates/submissions/_submission_refereeing_history_entry.html

 {% if sibling.preprint.identifier_w_vn_nr in request.path %}
-  <p class="text-center bg-info"><em>You are currently on this page</em></p>
+  <p class="text-center bg-info"><em>You are viewing this version</em></p>
 {% endif %}
 <div class="mt-3 mb-1">
   {% if sibling.is_resubmission_of %}Resubmission{% else %}Submission{% endif %} <a href="{{ sibling.get_absolute_url }}" class="pubtitleli"{% if target_blank %} target="_blank"{% endif %}>{{ sibling.preprint.identifier_w_vn_nr }}</a> on {{ sibling.submission_date|date:'j F Y' }}