[Backport/2.8/61654]Update ce_ntp to fix bugs (#62655)

* Update ce_ntp to fix bugs

(cherry picked from commit afea7cc454)

* Update ce_ntp modified information

changelogs/fragments/61654-ce_ntp-to-fix-bugs.yml

@@ -0,0 +1,2 @@
+bugfixes:
+- ce_ntp - update to fix some bugs - Add some update statements. (https://github.com/ansible/ansible/pull/61654)

lib/ansible/modules/network/cloudengine/ce_ntp.py

@@ -574,7 +574,8 @@ class Ntp(object):
                         cli_str = "%s %s" % (
                             "undo ntp unicast-peer ipv6", self.address)
                 if (self.vpn_name) and (self.vpn_name != '_public_'):
-                    cli_str = "%s %s" % (cli_str, self.vpn_name)
+                    cli_str = "%s %s %s" % (
+                        cli_str, "vpn-instance", self.vpn_name)
 
         self.updates_cmd.append(cli_str)