Bump rack from 1.2.1 to 2.2.14 in /examples/camping

Bumps [rack](https://github.com/rack/rack) from 1.2.1 to 2.2.14.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@1.2.1...v2.2.14)

---
updated-dependencies:
- dependency-name: rack
  dependency-version: 2.2.14
  dependency-type: direct:production
...

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

Author: dependabot[bot]

examples/camping/Gemfile.lock

@@ -1,15 +1,16 @@
 GEM
-  remote: http://rubygems.org/
+  remote: https://rubygems.org/
   specs:
     builder (3.0.0)
     camping (2.1)
       rack (>= 1.0)
     markaby (0.7.1)
       builder (>= 2.0.0)
-    rack (1.2.1)
+    rack (2.2.14)
 
 PLATFORMS
   java
+  x86_64-linux
 
 DEPENDENCIES
   camping