Bump nokogiri from 1.18.7 to 1.18.8

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.18.7 to 1.18.8.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.18.7...v1.18.8)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-version: 1.18.8
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Gemfile

@@ -20,7 +20,7 @@ gem 'honeybadger'
 gem 'jbuilder', '~> 2.5' # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 gem 'jsbundling-rails', '~> 1.0'
 gem 'lograge'
-gem 'nokogiri', '~> 1.14'
+gem 'nokogiri', '~> 1.18'
 gem 'okcomputer' # monitors application and its dependencies
 gem 'prawn', '~> 1' # Prawn is used to create "tracksheets"
 gem 'prawn-table'