Bump rack from 3.1.10 to 3.1.11 in /examples/v2/kitchensink

Bumps [rack](https://github.com/rack/rack) from 3.1.10 to 3.1.11.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v3.1.10...v3.1.11)

---
updated-dependencies:
- dependency-name: rack
  dependency-type: indirect
...

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Author: dependabot[bot]

examples/v2/kitchensink/Gemfile.lock

@@ -15,7 +15,7 @@ GEM
     nio4r (2.7.4)
     puma (6.5.0)
       nio4r (~> 2.0)
-    rack (3.1.10)
+    rack (3.1.11)
     rack-protection (4.1.1)
       base64 (>= 0.1.0)
       logger (>= 1.6.0)