Bump nokogiri from 1.13.4 to 1.13.6

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.13.4 to 1.13.6.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.13.4...v1.13.6)

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

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

Author: dependabot[bot]

Gemfile

@@ -58,7 +58,7 @@ group :test do
   gem 'rspec'
   gem 'rspec-activemodel-mocks'
   gem 'rspec-collection_matchers'
-  gem 'nokogiri', '~> 1.13.4'
+  gem 'nokogiri', '~> 1.13.6'
   gem 'webrat'
 end
 

Gemfile.lock

@@ -109,7 +109,7 @@ GEM
     multi_test (0.1.2)
     multi_xml (0.5.5)
     multipart-post (2.0.0)
-    nokogiri (1.13.4)
+    nokogiri (1.13.6)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     oauth2 (1.0.0)
@@ -235,7 +235,7 @@ DEPENDENCIES
   jquery-rails
   jruby-openssl
   lesstile (~> 1.1.0)
-  nokogiri (~> 1.13.4)
+  nokogiri (~> 1.13.6)
   omniauth
   omniauth-google-oauth2
   omniauth-openid