Start tag has wrong closing tag (#834)

Author: zingero

src/pytest_html/resources/index.jinja2

@@ -29,7 +29,7 @@
     <template id="template_results-table__body--empty">
       <tbody class="results-table-row">
         <tr id="not-found-message">
-          <td colspan="{{ table_head|length }}">No results found. Check the filters.</th>
+          <td colspan="{{ table_head|length }}">No results found. Check the filters.</td>
         </tr>
     </template>
     <template id="template_results-table__tbody">