Update nokogiri requirement from >= 1.6, < 1.17 to >= 1.6, < 1.18

Updates the requirements on [nokogiri](https://github.com/sparklemotion/nokogiri) to permit the latest version.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.6.0...v1.17.0)

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

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

freight_kit.gemspec

@@ -42,7 +42,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency('httparty', '~> 0.10')
   spec.add_dependency('measured', '>= 2.0', '< 3.1.1')
   spec.add_dependency('mimemagic', '~> 0.4.3')
-  spec.add_dependency('nokogiri', '>= 1.6', '< 1.17')
+  spec.add_dependency('nokogiri', '>= 1.6', '< 1.18')
   spec.add_dependency('place_kit', '~> 0.0.2')
   spec.add_dependency('savon', '>= 2.0', '< 2.16')
   spec.add_dependency('tzinfo-data', '~> 1.2023', '>= 1.2023.3')