build(deps-dev): bump rack from 3.1.21 to 3.2.6

Bumps [rack](https://github.com/rack/rack) from 3.1.21 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@v3.1.21...v3.2.6)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -72,7 +72,7 @@ GEM
       racc
     prism (1.9.0)
     racc (1.8.1)
-    rack (3.1.21)
+    rack (3.2.6)
     rails-dom-testing (2.2.0)
       activesupport (>= 5.0.0)
       minitest