Bump rack from 2.2.3.1 to 2.2.6.2 (heroku#109)

Bumps [rack](https://github.com/rack/rack) from 2.2.3.1 to 2.2.6.2.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@2.2.3.1...v2.2.6.2)

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

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Author: dependabot[bot]

Gemfile.lock

@@ -126,7 +126,7 @@ GEM
     puma (5.6.4)
       nio4r (~> 2.0)
     racc (1.6.0)
-    rack (2.2.3.1)
+    rack (2.2.6.2)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (7.0.4)