Bump rack from 2.2.3.1 to 2.2.6.3

Bumps [rack](https://github.com/rack/rack) from 2.2.3.1 to 2.2.6.3.
- [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...v2.2.6.3)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -91,7 +91,7 @@ GEM
     nokogiri (1.13.6-x86_64-darwin)
       racc (~> 1.4)
     racc (1.6.0)
-    rack (2.2.3.1)
+    rack (2.2.6.3)
     rack-protection (2.2.0)
       rack
     rack-test (1.1.0)