Bump nokogiri from 1.18.7 to 1.18.9

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.18.7 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@v1.18.7...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

@@ -245,9 +245,7 @@ GEM
     nap (1.1.0)
     naturally (2.2.1)
     nkf (0.2.0)
-    nokogiri (1.18.7-arm64-darwin)
-      racc (~> 1.4)
-    nokogiri (1.18.7-x86_64-linux-gnu)
+    nokogiri (1.18.9-x86_64-linux-gnu)
       racc (~> 1.4)
     octokit (6.1.1)
       faraday (>= 1, < 3)
@@ -334,7 +332,7 @@ GEM
       xcpretty (~> 0.2, >= 0.0.7)
 
 PLATFORMS
-  ruby
+  x86_64-linux
 
 DEPENDENCIES
   danger-dangermattic (~> 1.1)