Update rack requirement from ~> 2.2 to >= 2.2, < 4.0

Updates the requirements on [rack](https://github.com/rack/rack) to permit the latest version.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v2.2.13...v2.2.20)

---
updated-dependencies:
- dependency-name: rack
  dependency-version: 2.2.20
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -171,7 +171,7 @@ PATH
       json-ld-preloaded (~> 3.3)
       nokogiri (~> 1.15)
       puma (~> 6.6)
-      rack (~> 2.2)
+      rack (>= 2.2, < 4.0)
       rack-cache (~> 1.13)
       rdf (~> 3.3)
       rdf-microdata (~> 3.3)
@@ -274,7 +274,7 @@ GEM
     puma (6.6.0)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (2.2.13)
+    rack (2.2.20)
     rack-cache (1.17.0)
       rack (>= 0.4)
     rack-protection (3.2.0)

linter.gemspec

@@ -45,7 +45,7 @@ Gem::Specification.new do |gem|
   gem.add_runtime_dependency      'erubis',             '~> 2.7'
   gem.add_runtime_dependency      'haml',               '~> 6.1'
   gem.add_runtime_dependency      'json-ld-preloaded',  '~> 3.3'
-  gem.add_runtime_dependency      "rack",               '~> 2.2'
+  gem.add_runtime_dependency      "rack",               '>= 2.2', '< 4.0'
   gem.add_runtime_dependency      'rest-client',        '~> 2.1'
   gem.add_runtime_dependency      'rest-client-components', '~> 1.5'
   gem.add_runtime_dependency      'rack-cache',         '~> 1.13'