Fix breaking change in admin account API (#19176)

* Fix breaking change in admin account API

Ensure that `ip` is a String value and not returning a raw database entry

* please rubocop

app/serializers/rest/admin/account_serializer.rb

@@ -77,6 +77,6 @@ class REST::Admin::AccountSerializer < ActiveModel::Serializer
   end
 
   def ip
-    ips&.first
+    ips&.first&.ip
   end
 end