fix custom cni task name (#10087)

roles/network_plugin/custom_cni/tasks/main.yml

@@ -1,6 +1,5 @@
 ---
-
+- name: Custom CNI | Check Custom CNI Manifests
-- name: Cilium | Check Cilium encryption `cilium_ipsec_key` for ipsec
   assert:
     that:
       - "custom_cni_manifests | length > 0"