Bump rack from 2.2.4 to 2.2.6.4

Bumps [rack](https://github.com/rack/rack) from 2.2.4 to 2.2.6.4.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@2.2.4...v2.2.6.4)

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

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

Gemfile

@@ -28,7 +28,7 @@ gem 'loog', '0.3.1'
 gem 'minitest', '5.18.1', require: false
 gem 'minitest-reporters', '1.6.0', require: false
 gem 'pgtk', '0.8.1'
-gem 'rack', '2.2.4'
+gem 'rack', '2.2.6.4'
 gem 'rack-ssl', '1.4.1'
 gem 'rack-test', '2.1.0'
 gem 'rake', '13.0.6', require: false

Gemfile.lock

@@ -115,6 +115,8 @@ GEM
     mutex_m (0.2.0)
     nokogiri (1.16.0-arm64-darwin)
       racc (~> 1.4)
+    nokogiri (1.16.0-x86_64-linux)
+      racc (~> 1.4)
     openssl (3.2.0)
     parallel (1.24.0)
     parser (3.2.2.4)
@@ -129,7 +131,7 @@ GEM
     psych (5.1.2)
       stringio
     racc (1.7.3)
-    rack (2.2.4)
+    rack (2.2.6.4)
     rack-protection (3.0.6)
       rack
     rack-session (1.0.2)
@@ -271,6 +273,7 @@ GEM
 
 PLATFORMS
   arm64-darwin-22
+  x86_64-linux
 
 DEPENDENCIES
   glogin (= 0.13.0)
@@ -280,7 +283,7 @@ DEPENDENCIES
   minitest (= 5.18.1)
   minitest-reporters (= 1.6.0)
   pgtk (= 0.8.1)
-  rack (= 2.2.4)
+  rack (= 2.2.6.4)
   rack-ssl (= 1.4.1)
   rack-test (= 2.1.0)
   rake (= 13.0.6)