Bump nokogiri from 1.16.5 to 1.18.9

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.16.5 to 1.18.9.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.16.5...v1.18.9)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-version: 1.18.9
  dependency-type: indirect
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -214,9 +214,9 @@ GEM
     multi_json (1.15.0)
     net-http (0.9.1)
       uri (>= 0.11.1)
-    nokogiri (1.16.5-arm64-darwin)
+    nokogiri (1.18.9-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.16.5-x86_64-linux)
+    nokogiri (1.18.9-x86_64-linux-gnu)
       racc (~> 1.4)
     octokit (4.25.1)
       faraday (>= 1, < 3)