Bump nokogiri from 1.16.7 to 1.18.9

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.16.7 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@v1.16.7...v1.18.9)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-version: 1.18.9
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -60,11 +60,11 @@ GEM
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
-    nokogiri (1.16.7-arm64-darwin)
+    nokogiri (1.18.9-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.16.7-x64-mingw-ucrt)
+    nokogiri (1.18.9-x64-mingw-ucrt)
       racc (~> 1.4)
-    nokogiri (1.16.7-x86_64-linux)
+    nokogiri (1.18.9-x86_64-linux-gnu)
       racc (~> 1.4)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
@@ -86,7 +86,6 @@ GEM
     tzinfo-data (1.2024.1)
       tzinfo (>= 1.0.0)
     unicode-display_width (2.5.0)
-    wdm (0.1.1)
     webrick (1.8.2)
 
 PLATFORMS
@@ -103,7 +102,6 @@ DEPENDENCIES
   minima
   nokogiri
   tzinfo-data
-  wdm (~> 0.1.0)
   webrick
 
 BUNDLED WITH