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-version: 1.8.2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Gemfile

@@ -1,4 +1,4 @@
 source 'https://rubygems.org'
 gem 'jekyll'
 gem 'liquid'
-gem "webrick", "~> 1.7"
+gem "webrick", "~> 1.8"

Gemfile.lock

@@ -24,15 +24,15 @@ GEM
     posix-spawn (0.3.15)
     rake (13.0.6)
     rexml (3.3.9)
-    webrick (1.7.0)
+    webrick (1.8.2)
 
 PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
   jekyll
   liquid
-  webrick (~> 1.7)
+  webrick (~> 1.8)
 
 BUNDLED WITH
    2.3.20