<ruby> tag does not work

[random-integer]

Ruby text is used in East Asian languages to indicate the pronunciation of a character. I tried using this, but it doesn't work and falls back to the brackets as supplied by <rp>

Steps to reproduce:

1. Paste <ruby>漢<rp>(</rp><rt>Kan</rt><rp>)</rp>字<rp>(</rp><rt>ji</rt><rp>)</rp></ruby> into the body of a document
2. Look at the output in a web browser

Expected output:

Actual output:

[clente]

This is likely an issue with Hugo itself. I'm not sure how I can fix this on my end.