⬆️ Bump rack from 3.1.0 to 3.1.2 in /Builder (#2331)

Bumps [rack](https://github.com/rack/rack) from 3.1.0 to 3.1.2.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](https://github.com/rack/rack/commits)

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

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

Builder/Gemfile.lock

@@ -175,7 +175,7 @@ GEM
     puma (6.4.2)
       nio4r (~> 2.0)
     racc (1.8.0)
-    rack (3.1.0)
+    rack (3.1.2)
     rack-attack (6.7.0)
       rack (>= 1.0, < 4)
     rack-brotli (2.0.0)