Fix up date format

templates/admin.html

@@ -109,7 +109,7 @@
         <tbody>
             {% for donation in donations %}
             <tr>
-                <td>{{ donation.created.isoformat() }}</td>
+                <td>{{ donation.created.strftime("%Y-%m-%d") }}</td>
                 <td><a href="mailto:{{ donation.user.email }}">{{ donation.user.email }}</a></td>
                 <td>{{ donation.project.name if donation.project else "" }}</td>
                 <td title="{{ donation.comment }}">{{ donation.comment if donation.comment else "" }}</td>