[CHORE] use new stats page in admin classes overview

This was probably an oversight in hedyorg#4474

As we are going to remove all references to the old /stats/ and /logs/
pages this needs to be removed too.

templates/admin/admin-classes.html

@@ -37,7 +37,7 @@ <h4 class="text-center">Total amount of shown classes: {{ classes|length }} <br>
             <td class="error_percentage_week_cell">{% if class.stats.week.runs > 0 %}{{(class.stats.week.fails / class.stats.week.runs * 100)|round(2)}}{% else %}0.00{% endif %}%</td>
             <td class="runs_cell">{{class.stats.total.runs}}</td>
             <td class="error_percentage_cell">{% if class.stats.total.runs > 0 %}{{(class.stats.total.fails / class.stats.total.runs * 100)|round(2)}}{% else %}0.00{% endif %}%</td>
-            <td id="statistics_cell"><a href="/stats/class/{{class.id}}" target="_blank">Click here</a></td>
+            <td id="statistics_cell"><a href="/live_stats/class/{{class.id}}" target="_blank">Click here</a></td>
             <td id="overview_cell"><a href="/for-teachers/class/{{class.id}}" target="_blank">Click here</a></td>
           </tr>
       {% endfor %}