Bump rack from 2.2.3 to 2.2.4

Bumps [rack](https://github.com/rack/rack) from 2.2.3 to 2.2.4.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@2.2.3...2.2.4)

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

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

Gemfile.lock

@@ -82,7 +82,7 @@ GEM
       tty-color (~> 0.5)
     public_suffix (4.0.6)
     racc (1.6.0)
-    rack (2.2.3)
+    rack (2.2.4)
     rack-livereload (0.3.17)
       rack
     rb-fsevent (0.11.0)