Bump rack from 2.2.6.4 to 2.2.7 (#2832)

Bumps [rack](https://github.com/rack/rack) from 2.2.6.4 to 2.2.7.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](https://github.com/rack/rack/compare/v2.2.6.4...v2.2.7)

---
updated-dependencies:
- dependency-name: rack
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile

@@ -11,7 +11,7 @@ gem 'json'
 gem 'eventmachine', '~> 1.2', '>= 1.2.7'
 gem 'thin', '~> 1.8'
 gem 'sinatra', '~> 3.0', '>= 3.0.5'
-gem 'rack', '~> 2.2', '>= 2.2.4'
+gem 'rack', '~> 2.2'
 gem 'rack-protection', '~> 3.0.5'
 gem 'em-websocket', '~> 0.5.3' # WebSocket support
 gem 'uglifier', '~> 4.2'

Gemfile.lock

@@ -113,7 +113,7 @@ GEM
       mojo_magick (~> 0.6.5)
       rqrcode_core (~> 0.1)
     racc (1.6.2)
-    rack (2.2.6.4)
+    rack (2.2.7)
     rack-protection (3.0.5)
       rack
     rack-test (2.1.0)
@@ -249,7 +249,7 @@ DEPENDENCIES
   parseconfig (~> 1.1, >= 1.1.2)
   pry-byebug (~> 3.10, >= 3.10.1)
   qr4r (~> 0.6.1)
-  rack (~> 2.2, >= 2.2.4)
+  rack (~> 2.2)
   rack-protection (~> 3.0.5)
   rake (~> 13.0)
   rdoc (~> 6.5)