⬆️ Bump webrick from 1.8.2 to 1.9.0 in /builder

Bumps [webrick](https://github.com/ruby/webrick) from 1.8.2 to 1.9.0.
- [Release notes](https://github.com/ruby/webrick/releases)
- [Commits](ruby/webrick@v1.8.2...v1.9.0)

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

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

builder/Gemfile.lock

@@ -304,7 +304,7 @@ GEM
       zeitwerk (~> 2.2)
     warden (1.2.9)
       rack (>= 2.0.9)
-    webrick (1.8.2)
+    webrick (1.9.0)
     websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)