Change altnames to alt_names

Hi,

Could you please check if it was a typo?

https://www.vaultproject.io/api/secret/pki/

Regards,

roles/vault/defaults/main.yml

@@ -83,7 +83,7 @@ vault_ca_options:
     format: pem
     ttl: "{{ vault_max_lease_ttl }}"
     exclude_cn_from_sans: true
-    altnames:
+    alt_names:
       - "vault.{{ system_namespace }}.svc.{{ dns_domain }}"
       - "vault.{{ system_namespace }}.svc"
       - "vault.{{ system_namespace }}"