[templates] Fix video game detail page

vrobbler/templates/videogames/videogame_detail.html

@@ -88,7 +88,7 @@
                 <tbody>
                     {% for scrobble in scrobbles.all|dictsortreversed:"timestamp" %}
                     <tr>
-                        <td>{{scrobble.local-timestamp}}</td>
+                        <td>{{scrobble.local_timestamp}}</td>
                         <td>{% if scrobble.long_play_complete == True %}Yes{% else %}Not yet{% endif %}</td>
                         <td>{% if scrobble.in_progress %}Now playing{% else %}{{scrobble.playback_position_seconds|natural_duration}}{% endif %}</td>
                         <td>{% for platform in scrobble.video_game.platforms.all %}<a href="{{platform.get_absolute_url}}">{{platform}}</a>{% if not forloop.last %}, {% endif %}{% endfor %}</td>