Bump rack from 2.2.3 to 2.2.3.1

Bumps [rack](https://github.com/rack/rack) from 2.2.3 to 2.2.3.1.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@2.2.3...2.2.3.1)

---
updated-dependencies:
- dependency-name: rack
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -11,7 +11,7 @@ GEM
     parallel (1.19.2)
     parser (2.7.2.0)
       ast (~> 2.4.1)
-    rack (2.2.3)
+    rack (2.2.3.1)
     rainbow (3.0.0)
     rake (13.0.1)
     regexp_parser (1.8.2)