Bump rack from 2.2.7 to 2.2.8

Bumps [rack](https://github.com/rack/rack) from 2.2.7 to 2.2.8.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v2.2.7...v2.2.8)

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

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -131,7 +131,7 @@ GEM
     puma (6.3.0)
       nio4r (~> 2.0)
     racc (1.6.2)
-    rack (2.2.7)
+    rack (2.2.8)
     rack-cors (2.0.1)
       rack (>= 2.0.0)
     rack-proxy (0.7.6)