Update sponsor.html

Author: Dreamsorcerer

theme/templates/fragments/sponsor.html

@@ -1,3 +1,9 @@
 {% for sponsor in SPONSORS %}
+    {% if sponsor.img %}
 <a href="{{ sponsor.url }}"><img src={{ sponsor.img }} alt="{{ sponsor.name }}" /></a>
+    {% elif sponsor.url %}
+<a href="{{ sponsor.url }}">{{ sponsor.name }}</a>
+    {% else %}
+{{ sponsor.name }}
+    {% endif %}
 {% endfor %}