Bump nokogiri from 1.16.5 to 1.18.4

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.16.5 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@v1.16.5...v1.18.4)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -64,9 +64,9 @@ GEM
     minitest (5.21.2)
     mutex_m (0.2.0)
     nenv (0.3.0)
-    nokogiri (1.16.5-arm64-darwin)
+    nokogiri (1.18.4-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.16.5-x86_64-linux)
+    nokogiri (1.18.4-x86_64-linux-gnu)
       racc (~> 1.4)
     notiffany (0.1.3)
       nenv (~> 0.1)
@@ -80,7 +80,7 @@ GEM
       method_source (~> 1.0)
     psych (5.1.2)
       stringio
-    racc (1.8.0)
+    racc (1.8.1)
     rainbow (3.1.1)
     rake (13.1.0)
     rb-fsevent (0.11.2)