Bump rack from 3.0.9 to 3.0.9.1 (#29)

Bumps [rack](https://github.com/rack/rack) from 3.0.9 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@v3.0.9...v3.0.9.1)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -58,7 +58,7 @@ GEM
       method_source (~> 1.0)
     public_suffix (5.0.4)
     racc (1.7.3)
-    rack (3.0.9)
+    rack (3.0.9.1)
     rack-protection (4.0.0)
       base64 (>= 0.1.0)
       rack (>= 3.0.0, < 4)