Bump glob-parent, @antora/site-generator-default and npm-watch in /docs

Bumps [glob-parent](https://github.com/gulpjs/glob-parent), [@antora/site-generator-default](https://gitlab.com/antora/antora) and [npm-watch](https://github.com/M-Zuber/npm-watch). These dependencies needed to be updated together.

Updates `glob-parent` from 3.1.0 to 6.0.2
- [Release notes](https://github.com/gulpjs/glob-parent/releases)
- [Changelog](https://github.com/gulpjs/glob-parent/blob/main/CHANGELOG.md)
- [Commits](gulpjs/glob-parent@v3.1.0...v6.0.2)

Updates `@antora/site-generator-default` from 2.3.3 to 3.1.0
- [Release notes](https://gitlab.com/antora/antora/tags)
- [Changelog](https://gitlab.com/antora/antora/blob/main/CHANGELOG.adoc)
- [Commits](https://gitlab.com/antora/antora/compare/v2.3.3...v3.1.0)

Updates `npm-watch` from 0.6.0 to 0.11.0
- [Release notes](https://github.com/M-Zuber/npm-watch/releases)
- [Commits](M-Zuber/npm-watch@v0.6.0...v0.11.0)

---
updated-dependencies:
- dependency-name: glob-parent
  dependency-type: indirect
- dependency-name: "@antora/site-generator-default"
  dependency-type: direct:production
- dependency-name: npm-watch
  dependency-type: direct:production
...

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