Bump rack from 2.2.17 to 2.2.18 (#1668)

Bumps [rack](https://github.com/rack/rack) from 2.2.17 to 2.2.18.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v2.2.17...v2.2.18)

---
updated-dependencies:
- dependency-name: rack
  dependency-version: 2.2.18
  dependency-type: indirect
...

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Author: dependabot[bot]

Gemfile.lock

@@ -171,7 +171,7 @@ GEM
     puma (7.0.3)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (2.2.17)
+    rack (2.2.18)
     rack-proxy (0.7.7)
       rack
     rack-test (2.2.0)