⬆️ Bump rack from 3.1.7 to 3.1.8 in the rails group

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


Updates `rack` from 3.1.7 to 3.1.8
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v3.1.7...v3.1.8)

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

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -191,7 +191,7 @@ GEM
     puma (6.4.3)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (3.1.7)
+    rack (3.1.8)
     rack-proxy (0.7.7)
       rack
     rack-session (2.0.0)