Generated reference HTML doc element color is black

## Overview
I cloned this repository and generated the documentation using `build_antora.sh` in my local (Linux) environment.
The documentation was successfully generated, but I noticed an issue with the reference page (`doc/build/site/url/reference.html`). Specifically, the table elements (links to classes and functions) appear in bold black text. I believe these should be blue, as they used to be.
Other pages do not seem to have this issue.

## Environment
- node
- v22.12.0
- v16.20.2
- Boost.URL
- develop branch f93091350464891339c11a7a2e3c95f49e92404
- Browser
- Google Chrome 131.0.6778.108（Official Build) (64bit)
- OS
- Linux 6.12.1-arch1-1

## Steps to reproduce

```
git clone https://github.com/boostorg/url
cd url/doc
./build_antora.sh
```

## Attached files

- 
- [log.txt](https://github.com/user-attachments/files/18045509/log.txt)
- [built html doc tree](https://1drv.ms/u/c/9164139b3166c293/EXPFPLqyuSBIs3rLoZAp9O0BcFXvCsMji0olxVkSLj_ygA?e=F2bEpd)