fix up backport

ROCKY/_supporting/future-backport.patch

 diff --git a/config/cloud.cfg.tmpl b/config/cloud.cfg.tmpl
-index 08b6efb..ed82d8d 100644
+index 08b6efb..135b934 100644
 --- a/config/cloud.cfg.tmpl
 +++ b/config/cloud.cfg.tmpl
 @@ -2,7 +2,7 @@
@@ -11,3 +11,12 @@ index 08b6efb..ed82d8d 100644
  {% if is_bsd %}
  syslog_fix_perms: root:wheel
  {% elif variant in ["suse"] %}
+@@ -257,7 +257,7 @@ system_info:
+      name: ec2-user
+      lock_passwd: True
+      gecos: EC2 Default User
+-{% elif is_rhel %}
++{% elif variant in ["rhel", "centos"] %}
+      name: cloud-user
+      lock_passwd: true
+      gecos: Cloud User