build(deps): bump rack from 2.2.8 to 2.2.9

Bumps [rack](https://github.com/rack/rack) from 2.2.8 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@v2.2.8...v2.2.9)

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

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

Gemfile.lock

@@ -228,7 +228,7 @@ GEM
     pundit (2.3.1)
       activesupport (>= 3.0.0)
     racc (1.7.3)
-    rack (2.2.8)
+    rack (2.2.9)
     rack-mini-profiler (3.3.0)
       rack (>= 1.2.0)
     rack-test (2.1.0)