docs-deps(deps): bump linkify-it-py from 2.0.3 to 2.1.0 in /docs

Bumps [linkify-it-py](https://github.com/tsutsu3/linkify-it-py) from 2.0.3 to 2.1.0.
- [Release notes](https://github.com/tsutsu3/linkify-it-py/releases)
- [Changelog](https://github.com/tsutsu3/linkify-it-py/blob/main/CHANGELOG.md)
- [Commits](tsutsu3/linkify-it-py@v2.0.3...v2.1.0)

---
updated-dependencies:
- dependency-name: linkify-it-py
  dependency-version: 2.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]