Log Message:
textproc/ruby-kramdown-rfc2629: update to 1.7.23

1.7.22 (2025-01-24)

* Add v3xml2rfc PIs.  For example, when defining new BCP14-style keywords,
  you can add to the front matter YAML:

  v3xml2rfc:
    silence:
    - Expected one of the permitted words or phrases from RFC 2119

1.7.23 (2025-01-31)

* Check for duplicate keys in YAML header.  Close #251