Bump rack from 2.2.6.4 to 3.0.9.1

Bumps [rack](https://github.com/rack/rack) from 2.2.6.4 to 3.0.9.1.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v2.2.6.4...v3.0.9.1)

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

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

Gemfile.lock

@@ -72,7 +72,7 @@ GEM
       rack (>= 1.2, < 4)
       snaky_hash (~> 2.0)
       version_gem (~> 1.1)
-    rack (2.2.6.4)
+    rack (3.0.9.1)
     rake (13.0.6)
     rest-client (2.1.0)
       http-accept (>= 1.7.0, < 2.0)