Bump webrick from 1.8.1 to 1.8.2 in /benchmarks

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] <[email protected]>

Author: dependabot[bot]

benchmarks/Gemfile.lock

@@ -58,7 +58,7 @@ GEM
       tilt (~> 2.0)
     tilt (2.4.0)
     vernier (1.2.1)
-    webrick (1.8.1)
+    webrick (1.8.2)
 
 PLATFORMS
   arm64-darwin-23