update and simplify members

fet2020/templates/members/partials/_member.html

@@ -1,8 +0,0 @@
-<figure>
-    <a href="{{ member.get_absolute_url }}">
-        <img loading="lazy" src="{{ member.image.thumb.url }}" alt="Portraitfoto von {{ member.firstname }}" class="w-36 h-36 bg-white">
-        <figcaption>
-            <h3>{{ member.firstname }} {{ member.surname }}</h3>
-        </figcaption>
-    </a>
-</figure>