Bump nokogiri in /docs in the bundler group across 1 directory

Bumps the bundler group with 1 update in the /docs directory: [nokogiri](https://github.com/sparklemotion/nokogiri).


Updates `nokogiri` from 1.18.3 to 1.18.4
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.18.3...v1.18.4)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-version: 1.18.4
  dependency-type: indirect
  dependency-group: bundler
...

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

Author: dependabot[bot]

docs/Gemfile.lock

@@ -92,7 +92,7 @@ GEM
       jekyll-seo-tag (~> 2.1)
     minitest (5.24.1)
     mutex_m (0.2.0)
-    nokogiri (1.18.3-x86_64-linux-gnu)
+    nokogiri (1.18.4-x86_64-linux-gnu)
       racc (~> 1.4)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)