Show an IPv6 sample in placeholder text

The restrict by IP feature for groups supports
IPv6 CIDRs but this is not clear from the UI

This change extends the placeholder text with
an IPv6 CIDR example

Related documentation MR:
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/80789

Changelog: other
EE: true

ee/app/assets/javascripts/pages/groups/edit/index.js

@@ -21,7 +21,7 @@ initAccessRestrictionField({
 
 initAccessRestrictionField({
   selector: '.js-ip-restriction',
-  props: { placeholder: __('192.168.0.0/24') },
+  props: { placeholder: __('192.168.0.0/24 or 2001:0DB8:1234::/48') },
   qaSelector: 'ip_restriction_field',
   customValidator: validateRestrictedIpAddress,
 });

locale/gitlab.pot

@@ -1455,7 +1455,7 @@ msgstr ""
 msgid "1000+"
 msgstr ""
 
-msgid "192.168.0.0/24"
+msgid "192.168.0.0/24 or 2001:0DB8:1234::/48"
 msgstr ""
 
 msgid "1st contribution!"