Bump nokogiri from 1.10.4 to 1.10.8

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.10.4 to 1.10.8.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/compare/v1.10.4...v1.10.8)

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

Gemfile

@@ -8,7 +8,7 @@ group :development, :test do
   gem 'jekyll-redirect-from', '~> 0.14.0'
   gem 'jekyll-sitemap', '~> 1.2.0'
   gem 'rouge', '~> 3.2.1'
-  gem 'nokogiri', '~> 1.10.4'
+  gem 'nokogiri', '~> 1.10.8'
   gem "jekyll-last-modified-at", "~> 1.0"
   gem 'wdm', '~> 0.1.1', :install_if => Gem.win_platform?
 end

Gemfile.lock

@@ -46,7 +46,7 @@ GEM
       ruby_dep (~> 1.2)
     mercenary (0.3.6)
     mini_portile2 (2.4.0)
-    nokogiri (1.10.4)
+    nokogiri (1.10.8)
       mini_portile2 (~> 2.4.0)
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
@@ -73,7 +73,7 @@ DEPENDENCIES
   jekyll-last-modified-at (~> 1.0)
   jekyll-redirect-from (~> 0.14.0)
   jekyll-sitemap (~> 1.2.0)
-  nokogiri (~> 1.10.4)
+  nokogiri (~> 1.10.8)
   rouge (~> 3.2.1)
   wdm (~> 0.1.1)