Update two external Links to prevent tabnabbing

Added noopener to prevent tabnabbing

src/static/templates/admin/diagnostics.hbs

@@ -168,8 +168,8 @@
                 <dl class="row">
                     <dd class="col-sm-12">
                         If you need support please check the following links first before you create a new issue:
-                         <a href="https://vaultwarden.discourse.group/" target="_blank" rel="noreferrer">Vaultwarden Forum</a>
+                         <a href="https://vaultwarden.discourse.group/" target="_blank" rel="noreferrer noopener">Vaultwarden Forum</a>
-                         | <a href="https://github.com/dani-garcia/vaultwarden/discussions" target="_blank" rel="noreferrer">Github Discussions</a>
+                         | <a href="https://github.com/dani-garcia/vaultwarden/discussions" target="_blank" rel="noreferrer noopener">Github Discussions</a>
                     </dd>
                 </dl>
                 <dl class="row">