web-ui: prap resource data into <pre>

The Data string may contain multiline-strings.  Use code formatting per:
https://getbootstrap.com/docs/4.0/content/code/

Author: praiskup

resallocwebui/templates/resources.html

@@ -31,7 +31,7 @@ <h1 class="resource--title">Resalloc resources</h1>
         <td>{{ resource.ticket_id }}</td>
         <td>{{ resource.user }}</td>
         <td>{{ resource.sandbox }}</td>
-        <td>{{ resource.to_dict()["data"] }}</td>
+        <td><pre><code>{{ resource.to_dict()["data"] }}</code></pre></td>
     </tr>
     {% endfor %}
     </tbody>