Bump rack from 3.2.5 to 3.2.6 (#950)

Bumps [rack](https://github.com/rack/rack) from 3.2.5 to 3.2.6.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v3.2.5...v3.2.6)

---
updated-dependencies:
- dependency-name: rack
  dependency-version: 3.2.6
  dependency-type: indirect
...

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Author: dependabot[bot]

Gemfile.lock

@@ -205,7 +205,7 @@ GEM
     puma (7.2.0)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (3.2.5)
+    rack (3.2.6)
     rack-session (2.1.1)
       base64 (>= 0.1.0)
       rack (>= 3.0.0)