HTTP 429 status code is not supported in responses section

Bug Report
1

I’ve noticed that I can’t add a endpoint’s response with 429 status code which is an officially supported by RFC 6585
https://www.rfc-editor.org/rfc/rfc6585#section-4

2

Same situation with 302 status code

3

In addition to selecting built-in status codes, you can directly enter a status code. Furthermore, we will be adding more built-in status codes in the near future.