Bump rack from 2.2.2 to 2.2.3

Bumps [rack](https://github.com/rack/rack) from 2.2.2 to 2.2.3.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/master/CHANGELOG.md)
- [Commits](rack/rack@v2.2.2...2.2.3)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Gemfile.lock

@@ -81,7 +81,7 @@ GEM
     nokogumbo (2.0.2)
       nokogiri (~> 1.8, >= 1.8.4)
     public_suffix (4.0.3)
-    rack (2.2.2)
+    rack (2.2.3)
     rake (13.0.1)
     rdf (3.1.1)
       hamster (~> 3.0)