Bump webrick from 1.7.0 to 1.8.2 (#139)

Bumps [webrick](https://github.com/ruby/webrick) from 1.7.0 to 1.8.2.
- [Release notes](https://github.com/ruby/webrick/releases)
- [Commits](ruby/webrick@v1.7.0...v1.8.2)

---
updated-dependencies:
- dependency-name: webrick
  dependency-type: direct:production
...

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

Gemfile

@@ -11,4 +11,4 @@ git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
 #
 #     bundle exec jekyll serve
 gem "github-pages", group: :jekyll_plugins
-gem "webrick", "~> 1.7"
+gem "webrick", "~> 1.8"

Gemfile.lock

@@ -253,15 +253,15 @@ GEM
       unf_ext
     unf_ext (0.0.8.2)
     unicode-display_width (1.8.0)
-    webrick (1.7.0)
+    webrick (1.8.2)
     zeitwerk (2.6.6)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   github-pages
-  webrick (~> 1.7)
+  webrick (~> 1.8)
 
 RUBY VERSION
    ruby 2.6.8p205