display isni bio with existing author name

If an existing author has an isni on record and it matches an author from the isni api call,
display the isni short description to aid with identifying the appropriate author.

bookwyrm/templates/book/edit/edit_book.html

@@ -1,6 +1,7 @@
 {% extends 'layout.html' %}
 {% load i18n %}
 {% load humanize %}
+{% load utilities %}
 
 {% block title %}{% if book %}{% blocktrans with book_title=book.title %}Edit "{{ book_title }}"{% endblocktrans %}{% else %}{% trans "Add Book" %}{% endif %}{% endblock %}
 
@@ -75,6 +76,9 @@
                         <p class="help ml-5 mb-2">
                             <a href="{{ match.local_path }}" target="_blank">{% blocktrans with book_title=match.book_set.first.title %}Author of <em>{{ book_title }}</em>{% endblocktrans %}</a>
                         </p>
+                        <p class="help ml-5">
+                            {{ author.existing_isnis|get_isni_bio:match }}
+                        </p>
                         {% endfor %}
                         <label class="label mt-2">
                             <input type="radio" name="author_match-{{ counter }}" value="{{ author.name }}" required> {% trans "This is a new author" %}