build(deps-dev): bump rackup from 2.2.0 to 2.2.1

Bumps [rackup](https://github.com/rack/rackup) from 2.2.0 to 2.2.1.
- [Release notes](https://github.com/rack/rackup/releases)
- [Changelog](https://github.com/rack/rackup/blob/main/releases.md)
- [Commits](rack/rackup@v2.2.0...v2.2.1)

---
updated-dependencies:
- dependency-name: rackup
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile

@@ -13,7 +13,7 @@ group :development do
   gem 'sass-embedded', '1.81.0'
   gem 'rubocop', '1.68.0'
   gem 'ruby-lsp', '0.21.3'
-  gem 'rackup', '2.2.0'
+  gem 'rackup', '2.2.1'
 end
 
 group :jekyll_plugins do

Gemfile.lock

@@ -100,7 +100,7 @@ GEM
       rack (>= 3.0.0, < 4)
     rack-session (2.0.0)
       rack (>= 3.0.0)
-    rackup (2.2.0)
+    rackup (2.2.1)
       rack (>= 3)
     rainbow (3.1.1)
     rake (13.2.1)
@@ -173,7 +173,7 @@ DEPENDENCIES
   jekyll-sitemap (= 1.4.0)
   jekyll-toc (= 0.19.0)
   nokogiri (= 1.16.7)
-  rackup (= 2.2.0)
+  rackup (= 2.2.1)
   rake (= 13.2.1)
   rubocop (= 1.68.0)
   ruby-lsp (= 0.21.3)