Bump nokogiri from 1.16.8 to 1.18.3 in /back

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.16.8 to 1.18.3.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/v1.18.3/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.16.8...v1.18.3)

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

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

back/Gemfile

@@ -102,7 +102,7 @@ gem 'interactor'
 gem 'interactor-rails'
 gem 'liquid', '~> 5.5'
 gem 'mini_magick', '~> 4.13'
-gem 'nokogiri', '~> 1.16.5'
+gem 'nokogiri', '~> 1.18.3'
 gem 'pg_search', '~> 2.3.5'
 gem 'premailer-rails', '~> 1.12.0'
 gem 'rest-client'

back/Gemfile.lock

@@ -856,13 +856,13 @@ GEM
     nkf (0.1.3)
     nlpcloud (1.0.45)
       rest-client (~> 2.1)
-    nokogiri (1.16.8-aarch64-linux)
+    nokogiri (1.18.3-aarch64-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.16.8-arm64-darwin)
+    nokogiri (1.18.3-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.16.8-x86_64-darwin)
+    nokogiri (1.18.3-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.16.8-x86_64-linux)
+    nokogiri (1.18.3-x86_64-linux-gnu)
       racc (~> 1.4)
     nori (2.6.0)
     oauth2 (1.4.11)
@@ -1365,7 +1365,7 @@ DEPENDENCIES
   mutex_m
   neighbor (~> 0.5.0)
   nkf
-  nokogiri (~> 1.16.5)
+  nokogiri (~> 1.18.3)
   okcomputer
   omniauth (~> 2.1)
   omniauth-facebook