Bump webrick from 1.8.2 to 1.9.0 (#76)

Bumps [webrick](https://github.com/ruby/webrick) from 1.8.2 to 1.9.0.
- [Release notes](https://github.com/ruby/webrick/releases)
- [Commits](ruby/webrick@v1.8.2...v1.9.0)

---
updated-dependencies:
- dependency-name: webrick
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile

@@ -6,7 +6,7 @@ group :jekyll_plugins do
   gem 'jekyll-tagging'
   gem "jekyll-sitemap"
   gem "jekyll-pagebreak", "~> 0.9"
-  gem "webrick", "~> 1.8"
+  gem "webrick", "~> 1.9"
   gem 'wdm', '~> 0.2.0', :install_if => Gem.win_platform?
   gem 'jekyll-feed'
 end

Gemfile.lock

@@ -89,7 +89,7 @@ GEM
       unicode-display_width (>= 1.1.1, < 3)
     unicode-display_width (2.6.0)
     wdm (0.2.0)
-    webrick (1.8.2)
+    webrick (1.9.0)
 
 PLATFORMS
   ruby
@@ -105,7 +105,7 @@ DEPENDENCIES
   jekyll-tagging
   jekyll-watch!
   wdm (~> 0.2.0)
-  webrick (~> 1.8)
+  webrick (~> 1.9)
 
 BUNDLED WITH
    2.3.23