### Description Similar to #10533 generate [`std-index.txt`](https://www.rfc-editor.org/std/std-index.txt). ### Code of Conduct - [x] I agree to follow the [IETF's Code of Conduct](https://github.com/ietf-tools/.github/blob/main/CODE_OF_CONDUCT.md)
Description
Similar to #10533 generate
std-index.txt.Code of Conduct