build(deps): 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: indirect
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -185,7 +185,7 @@ GEM
       get_process_mem (~> 0.2)
       puma (>= 2.7)
     racc (1.7.1)
-    rack (2.2.7)
+    rack (2.2.8)
     rack-mini-profiler (3.1.0)
       rack (>= 1.2.0)
     rack-test (2.1.0)