Bump jekyll from 4.3.0 to 4.3.1 in /docs (#948)

Bumps [jekyll](https://github.com/jekyll/jekyll) from 4.3.0 to 4.3.1.
- [Release notes](https://github.com/jekyll/jekyll/releases)
- [Changelog](https://github.com/jekyll/jekyll/blob/master/History.markdown)
- [Commits](https://github.com/jekyll/jekyll/compare/v4.3.0...v4.3.1)

---
updated-dependencies:
- dependency-name: jekyll
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/Gemfile.lock

@@ -14,7 +14,7 @@ GEM
     http_parser.rb (0.8.0)
     i18n (1.12.0)
       concurrent-ruby (~> 1.0)
-    jekyll (4.3.0)
+    jekyll (4.3.1)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)