Update changes_table.html

Author: philangist

codespeed/templates/codespeed/changes_table.html

@@ -74,7 +74,7 @@
   </tr>
 </thead>
 <tbody>
-  <tr class="commit -id">
+  <tr class="commit-id">
     <th class="infofirst">Commit</th>
     <td>{% if rev.get_browsing_url %}<a href="{{ rev.get_browsing_url }}">{{ rev.commitid }}</a>{% else %}{{ rev.commitid }}{% endif %}</td>
   </tr>