Bump nokogiri from 1.18.10 to 1.19.1 in /docs

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.18.10 to 1.19.1.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.18.10...v1.19.1)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-version: 1.19.1
  dependency-type: indirect
...

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

Author: dependabot[bot]

docs/Gemfile.lock

@@ -47,6 +47,7 @@ GEM
     faraday-net_http (3.4.1)
       net-http (>= 0.5.0)
     ffi (1.17.2-arm64-darwin)
+    ffi (1.17.2-x86_64-linux-gnu)
     forwardable-extended (2.6.0)
     gemoji (4.1.0)
     github-pages (232)
@@ -235,7 +236,9 @@ GEM
     minitest (5.26.0)
     net-http (0.6.0)
       uri
-    nokogiri (1.18.10-arm64-darwin)
+    nokogiri (1.19.1-arm64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.19.1-x86_64-linux-gnu)
       racc (~> 1.4)
     octokit (4.25.1)
       faraday (>= 1, < 3)
@@ -273,6 +276,7 @@ GEM
 
 PLATFORMS
   arm64-darwin-25
+  x86_64-linux
 
 DEPENDENCIES
   github-pages