Fix SAML config was empty template

plugins/netbox-rps-plugin/netbox_rps_plugin/templates/netbox_rps_plugin/httpheader/child.html

@@ -6,6 +6,13 @@
   <a href="{% url 'plugins:netbox_rps_plugin:httpheader_add' %}?mapping={{ object.pk }}&return_url={{ object.get_absolute_url }}" class="btn btn-sm btn-primary">
     <span class="mdi mdi-plus-thick" aria-hidden="true"></span> Add HTTP Header
   </a>
+  {% if not object.saml_config %}
+  <a href="{% url 'plugins:netbox_rps_plugin:samlconfig_add' %}?mapping={{ object.pk }}&return_url={{ object.get_absolute_url }}"
+    class="btn btn-sm btn-primary">
+    <span class="mdi mdi-plus-thick" aria-hidden="true"></span> Add <abbr
+      title="Security Assertion Markup Language">SAML</abbr> Configuration
+  </a>
+  {% endif %}
 {% endblock %}
 
 {% block content %}