Bump webrick from 1.7.0 to 1.8.2

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>

Gemfile

@@ -12,4 +12,4 @@ group :jekyll_plugins do
   gem 'kramdown-parser-gfm'
 end
 
-gem "webrick", "~> 1.7"
+gem "webrick", "~> 1.8"

Gemfile.lock

@@ -66,7 +66,7 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
     strscan (3.1.0)
-    webrick (1.7.0)
+    webrick (1.8.2)
 
 PLATFORMS
   ruby
@@ -78,7 +78,7 @@ DEPENDENCIES
   jekyll-liquify
   jekyll-sitemap
   kramdown-parser-gfm
-  webrick (~> 1.7)
+  webrick (~> 1.8)
 
 BUNDLED WITH
    2.1.4