Bump rack from 2.1.1 to 2.2.3 in /record-and-playback/core

Bumps [rack](https://github.com/rack/rack) from 2.1.1 to 2.2.3.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rack/rack/compare/2.1.1...2.2.3

)

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

record-and-playback/core/Gemfile.lock

@@ -29,7 +29,7 @@ GEM
     parallel (1.19.1)
     parser (2.7.0.2)
       ast (~> 2.4.0)
-    rack (2.1.1)
+    rack (2.2.3)
     rack-protection (2.0.8.1)
       rack
     rainbow (3.0.0)