chore: bump webrick from 1.7.0 to 1.8.2 in /docs (#299)

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:development
...

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

docs/Gemfile.lock

@@ -82,7 +82,7 @@ GEM
     tzinfo-data (1.2022.1)
       tzinfo (>= 1.0.0)
     unicode-display_width (2.3.0)
-    webrick (1.7.0)
+    webrick (1.8.2)
 
 PLATFORMS
   x64-mingw-ucrt