Bump nokogiri from 1.16.7 to 1.18.3

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.16.7 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@v1.16.7...v1.18.3)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -46,12 +46,16 @@ GEM
     fastimage (2.3.1)
     ffi (1.17.0-aarch64-linux-gnu)
     ffi (1.17.0-arm64-darwin)
+    ffi (1.17.0-x86_64-linux-gnu)
     google-protobuf (4.28.3-aarch64-linux)
       bigdecimal
       rake (>= 13)
     google-protobuf (4.28.3-arm64-darwin)
       bigdecimal
       rake (>= 13)
+    google-protobuf (4.28.3-x86_64-linux)
+      bigdecimal
+      rake (>= 13)
     govuk_tech_docs (4.1.1)
       autoprefixer-rails (~> 10.2)
       base64
@@ -86,6 +90,7 @@ GEM
       rexml
     libv8-node (18.16.0.0-aarch64-linux)
     libv8-node (18.16.0.0-arm64-darwin)
+    libv8-node (18.16.0.0-x86_64-linux)
     listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
@@ -148,9 +153,11 @@ GEM
     minitest (5.25.1)
     multi_json (1.15.0)
     mutex_m (0.2.0)
-    nokogiri (1.16.7-aarch64-linux)
+    nokogiri (1.18.3-aarch64-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.16.7-arm64-darwin)
+    nokogiri (1.18.3-arm64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.18.3-x86_64-linux-gnu)
       racc (~> 1.4)
     openapi3_parser (0.9.2)
       commonmarker (~> 0.17)
@@ -178,6 +185,8 @@ GEM
       google-protobuf (~> 4.28)
     sass-embedded (1.80.7-arm64-darwin)
       google-protobuf (~> 4.28)
+    sass-embedded (1.80.7-x86_64-linux-gnu)
+      google-protobuf (~> 4.28)
     sassc (2.4.0)
       ffi (~> 1.9)
     sassc-embedded (1.78.0)
@@ -202,6 +211,7 @@ GEM
 PLATFORMS
   aarch64-linux
   arm64-darwin-23
+  x86_64-linux
 
 DEPENDENCIES
   govuk_tech_docs (~> 4.1.1)