Bump json5, @antora/cli and @antora/site-generator-default in /docs

Bumps [json5](https://github.com/json5/json5) to 2.2.3 and updates ancestor dependencies [json5](https://github.com/json5/json5), [@antora/cli](https://gitlab.com/antora/antora) and [@antora/site-generator-default](https://gitlab.com/antora/antora). These dependencies need to be updated together.


Updates `json5` from 2.1.3 to 2.2.3
- [Release notes](https://github.com/json5/json5/releases)
- [Changelog](https://github.com/json5/json5/blob/main/CHANGELOG.md)
- [Commits](json5/json5@v2.1.3...v2.2.3)

Updates `@antora/cli` from 2.3.4 to 3.1.9
- [Changelog](https://gitlab.com/antora/antora/blob/main/CHANGELOG.adoc)
- [Commits](https://gitlab.com/antora/antora/compare/v2.3.4...v3.1.9)

Updates `@antora/site-generator-default` from 2.3.4 to 3.1.9
- [Changelog](https://gitlab.com/antora/antora/blob/main/CHANGELOG.adoc)
- [Commits](https://gitlab.com/antora/antora/compare/v2.3.4...v3.1.9)

---
updated-dependencies:
- dependency-name: json5
  dependency-type: indirect
- dependency-name: "@antora/cli"
  dependency-type: direct:production
- dependency-name: "@antora/site-generator-default"
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>