chore(deps): bump rack from 2.2.7 to 2.2.9 in /test

Bumps [rack](https://github.com/rack/rack) from 2.2.7 to 2.2.9.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v2.2.7...v2.2.9)

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

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

Author: dependabot[bot]

test/Gemfile.lock

@@ -75,7 +75,7 @@ GEM
       expgen (~> 0.1)
       rainbow (~> 3.1.1)
     parslet (2.0.0)
-    rack (2.2.7)
+    rack (2.2.9)
     rack-protection (3.0.6)
       rack
     rack-proxy (0.7.6)