chore(deps): 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: indirect
...

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

Gemfile.lock

@@ -76,6 +76,8 @@ GEM
       ffi
     multi_xml (0.6.0)
     netrc (0.11.0)
+    nokogiri (1.13.10-aarch64-linux)
+      racc (~> 1.4)
     nokogiri (1.13.10-x86_64-darwin)
       racc (~> 1.4)
     nokogiri (1.13.10-x86_64-linux)
@@ -88,7 +90,7 @@ GEM
       method_source (~> 1.0)
     public_suffix (4.0.6)
     racc (1.6.1)
-    rack (2.2.4)
+    rack (2.2.6.4)
     rack-test (2.0.2)
       rack (>= 1.3)
     rails-dom-testing (2.0.3)