Bump rack from 2.2.14 to 2.2.18

Bumps [rack](https://github.com/rack/rack) from 2.2.14 to 2.2.18.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v2.2.14...v2.2.18)

---
updated-dependencies:
- dependency-name: rack
  dependency-version: 2.2.18
  dependency-type: indirect
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -55,7 +55,7 @@ GEM
       byebug (~> 11.0)
       pry (>= 0.13, < 0.15)
     racc (1.8.1)
-    rack (2.2.14)
+    rack (2.2.18)
     rainbow (3.1.1)
     redis (5.3.0)
       redis-client (>= 0.22.0)