Bump nokogiri in the ruby-production-dependencies group

Bumps the ruby-production-dependencies group with 1 update: [nokogiri](https://github.com/sparklemotion/nokogiri).


Updates `nokogiri` from 1.17.2 to 1.18.0
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.17.2...v1.18.0)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-type: indirect
  update-type: version-update:semver-minor
  dependency-group: ruby-production-dependencies
...

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

Gemfile.lock

@@ -224,12 +224,12 @@ GEM
     net-smtp (0.5.0)
       net-protocol
     nio4r (2.7.4)
-    nokogiri (1.17.2)
+    nokogiri (1.18.0)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    nokogiri (1.17.2-x86_64-darwin)
+    nokogiri (1.18.0-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.17.2-x86_64-linux)
+    nokogiri (1.18.0-x86_64-linux-gnu)
       racc (~> 1.4)
     non-digest-assets (2.5.0)
       activesupport (>= 6.0, < 8.1)