fix: Add reviewer name to review assignment summary (ietf-tools#5363)

* fix: Add reviewer name to review assignment summary

Fixes ietf-tools#5360

* Address code review

* Fix test harder

Author: larseggert

ietf/templates/doc/review_assignment_summary.html

@@ -7,7 +7,8 @@
                 {% if review_assignment.review_request.doc.name != current_doc_name %}
                     {{ review_assignment.review_request.doc.name }}
                 {% endif %}
-                -{{ review_assignment.reviewed_rev }}){% endif %}</a>
+                -{{ review_assignment.reviewed_rev }}){% endif %}
+            by {{ review_assignment.reviewer.person.plain_name }}</a>
         {% if review_assignment.state_id == "part-completed" %}
             <span class="badge rounded-pill ms-1 bg-secondary">Partially completed</span>
         {% endif %}