fix missing newline in template (#10174)

roles/kubernetes-apps/ingress_controller/ingress_nginx/templates/ingressclass-nginx.yml.j2

@@ -8,6 +8,6 @@ metadata:
 {% if ingress_nginx_default %}
   annotations:
     ingressclass.kubernetes.io/is-default-class: "true"
-{%- endif %}
+{% endif %}
 spec:
   controller: k8s.io/ingress-nginx