Bump rack from 3.2.3 to 3.2.4 in /builder in the rails group (#2834)

Bumps the rails group in /builder with 1 update: [rack](https://github.com/rack/rack).


Updates `rack` from 3.2.3 to 3.2.4
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v3.2.3...v3.2.4)

---
updated-dependencies:
- dependency-name: rack
  dependency-version: 3.2.4
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: rails
...

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

Author: dependabot[bot]

builder/Gemfile.lock

@@ -193,7 +193,7 @@ GEM
     puma (7.1.0)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (3.2.3)
+    rack (3.2.4)
     rack-attack (6.8.0)
       rack (>= 1.0, < 4)
     rack-brotli (2.0.0)