Bump nokogiri in /docs in the bundler group across 1 directory

Bumps the bundler group with 1 update in the /docs directory: [nokogiri](https://github.com/sparklemotion/nokogiri).


Updates `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
  dependency-group: bundler
...

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

docs/Gemfile.lock

@@ -44,6 +44,7 @@ GEM
       logger
     faraday-net_http (3.4.0)
       net-http (>= 0.5.0)
+    ffi (1.17.0-x86_64-linux-gnu)
     ffi (1.17.0-x86_64-linux-musl)
     forwardable-extended (2.6.0)
     gemoji (4.1.0)
@@ -238,7 +239,9 @@ GEM
     minitest (5.25.1)
     net-http (0.5.0)
       uri
-    nokogiri (1.16.7-x86_64-linux)
+    nokogiri (1.18.3-x86_64-linux-gnu)
+      racc (~> 1.4)
+    nokogiri (1.18.3-x86_64-linux-musl)
       racc (~> 1.4)
     octokit (4.25.1)
       faraday (>= 1, < 3)
@@ -276,6 +279,7 @@ GEM
     webrick (1.9.0)
 
 PLATFORMS
+  x86_64-linux
   x86_64-linux-musl
 
 DEPENDENCIES