Bump rack from 2.0.6 to 2.1.4 in /assets/hello-routing

Bumps [rack](https://github.com/rack/rack) from 2.0.6 to 2.1.4.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/master/CHANGELOG.md)
- [Commits](rack/rack@2.0.6...2.1.4)

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

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

assets/hello-routing/Gemfile.lock

@@ -3,7 +3,7 @@ GEM
   specs:
     daemons (1.2.4)
     eventmachine (1.2.3)
-    rack (2.0.6)
+    rack (2.1.4)
     thin (1.7.2)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)