Bump nokogiri from 1.15.6 to 1.16.5 in /docs (#575)

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.15.6 to 1.16.5.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/compare/v1.15.6...v1.16.5)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-type: indirect
...

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

docs/Gemfile.lock

@@ -221,7 +221,7 @@ GEM
       jekyll-seo-tag (~> 2.1)
     minitest (5.22.3)
     mutex_m (0.2.0)
-    nokogiri (1.15.6-x86_64-linux)
+    nokogiri (1.16.5-x86_64-linux)
       racc (~> 1.4)
     octokit (4.25.1)
       faraday (>= 1, < 3)