Bump webrick from 1.8.1 to 1.8.2 in /docs (#257)

Bumps [webrick](https://github.com/ruby/webrick) from 1.8.1 to 1.8.2.
- [Release notes](https://github.com/ruby/webrick/releases)
- [Commits](ruby/webrick@v1.8.1...v1.8.2)

---
updated-dependencies:
- dependency-name: webrick
  dependency-version: 1.8.2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/Gemfile

@@ -32,4 +32,4 @@ gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
 # do not have a Java counterpart.
 gem "http_parser.rb", "~> 0.6.0", :platforms => [:jruby]
 
-gem "webrick", "~> 1.7"
+gem "webrick", "~> 1.8"

docs/Gemfile.lock

@@ -87,7 +87,7 @@ GEM
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     unicode-display_width (2.4.2)
-    webrick (1.8.1)
+    webrick (1.8.2)
 
 PLATFORMS
   arm64-darwin-21
@@ -107,7 +107,7 @@ DEPENDENCIES
   tzinfo (>= 1, < 3)
   tzinfo-data
   wdm (~> 0.1.1)
-  webrick (~> 1.7)
+  webrick (~> 1.8)
 
 BUNDLED WITH
    2.3.11