Bump rackup from 1.0.0 to 2.2.1

Bumps [rackup](https://github.com/rack/rackup) from 1.0.0 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@v1.0.0...v2.2.1)

---
updated-dependencies:
- dependency-name: rackup
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Gemfile

@@ -28,7 +28,7 @@ gem "pundit"
 # See https://github.com/puma/puma/pull/3532
 # `require: false` is needed because you can't actually `require "rackup"`
 # due to a different bug: https://github.com/rack/rackup/commit/d03e1789
-gem "rackup", "1.0.0", require: false
+gem "rackup", "2.2.1", require: false
 gem "select2-rails", "< 4" # v4 changes the generated HTML and breaks the e2e tests
 gem "sentry-sidekiq"
 gem "stringex"

Gemfile.lock

@@ -591,19 +591,19 @@ GEM
     pundit (2.4.0)
       activesupport (>= 3.0.0)
     racc (1.8.1)
-    rack (2.2.10)
-    rack-protection (3.2.0)
+    rack (3.1.8)
+    rack-protection (4.1.1)
       base64 (>= 0.1.0)
-      rack (~> 2.2, >= 2.2.4)
+      logger (>= 1.6.0)
+      rack (>= 3.0.0, < 4)
     rack-proxy (0.7.7)
       rack
-    rack-session (1.0.2)
-      rack (< 3)
+    rack-session (2.0.0)
+      rack (>= 3.0.0)
     rack-test (2.1.0)
       rack (>= 1.3)
-    rackup (1.0.0)
-      rack (< 3)
-      webrick
+    rackup (2.2.1)
+      rack (>= 3)
     rails (7.1.4)
       actioncable (= 7.1.4)
       actionmailbox (= 7.1.4)
@@ -828,7 +828,7 @@ DEPENDENCIES
   pry-rails
   puma
   pundit
-  rackup (= 1.0.0)
+  rackup (= 2.2.1)
   rails (= 7.1.4)
   rails-controller-testing
   rspec-rails