Bump webrick from 1.8.1 to 1.8.2

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-type: indirect
...

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

Gemfile.lock

@@ -316,7 +316,7 @@ GEM
     version_gem (1.1.1)
     warden (1.2.9)
       rack (>= 2.0.9)
-    webrick (1.8.1)
+    webrick (1.8.2)
     websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)