Bump webrick from 1.8.1 to 1.9.0

Bumps [webrick](https://github.com/ruby/webrick) from 1.8.1 to 1.9.0.
- [Release notes](https://github.com/ruby/webrick/releases)
- [Commits](ruby/webrick@v1.8.1...v1.9.0)

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

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

Gemfile

@@ -34,7 +34,7 @@ gem "wdm", :platforms => [:mingw, :x64_mingw, :mswin]
 gem "http_parser.rb", "~> 0.6.0", :platforms => [:jruby]
 
 #gem "webrick", "~> 1.7"
-gem "webrick", "~> 1.8.1"
+gem "webrick", "~> 1.9.0"
 gem "just-the-docs", "~> 0.8.2" # pinned version
 gem 'jemoji', "~> 0.13.0"
 gem 'kramdown-parser-gfm', "~> 1.1.0"

Gemfile.lock

@@ -271,7 +271,7 @@ GEM
     unicode-display_width (1.8.0)
     uri (0.13.0)
     wdm (0.1.1)
-    webrick (1.8.1)
+    webrick (1.9.0)
 
 PLATFORMS
   x64-mingw-ucrt
@@ -288,7 +288,7 @@ DEPENDENCIES
   tzinfo
   tzinfo-data
   wdm
-  webrick (~> 1.8.1)
+  webrick (~> 1.9.0)
 
 BUNDLED WITH
    2.3.26