Bump rack from 2.2.8 to 3.0.8

Bumps [rack](https://github.com/rack/rack) from 2.2.8 to 3.0.8.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v2.2.8...v3.0.8)

---
updated-dependencies:
- dependency-name: rack
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Gemfile.lock

@@ -225,11 +225,11 @@ GEM
       bunny (~> 2.17)
     govuk_schemas (4.7.0)
       json-schema (>= 2.8, < 4.2)
-    govuk_sidekiq (7.1.4)
+    govuk_sidekiq (7.1.1)
       gds-api-adapters (>= 19.1.0)
       govuk_app_config (>= 1.1)
       redis-namespace (~> 1.6)
-      sidekiq (> 6.5.10, < 7)
+      sidekiq (~> 6)
     govuk_test (4.0.1)
       brakeman (>= 5.0.2)
       capybara (>= 3.36)
@@ -549,18 +549,18 @@ GEM
     puma (6.4.0)
       nio4r (~> 2.0)
     racc (1.7.3)
-    rack (2.2.8)
-    rack-protection (3.1.0)
-      rack (~> 2.2, >= 2.2.4)
+    rack (3.0.8)
+    rack-protection (3.0.6)
+      rack
     rack-proxy (0.7.7)
       rack
-    rack-session (1.0.1)
-      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 (2.1.0)
+      rack (>= 3)
+      webrick (~> 1.8)
     rails (7.1.2)
       actioncable (= 7.1.2)
       actionmailbox (= 7.1.2)
@@ -713,10 +713,11 @@ GEM
     set (1.0.3)
     shoulda-matchers (5.3.0)
       activesupport (>= 5.2.0)
-    sidekiq (6.5.12)
-      connection_pool (>= 2.2.5, < 3)
-      rack (~> 2.0)
-      redis (>= 4.5.0, < 5)
+    sidekiq (6.0.4)
+      connection_pool (>= 2.2.2)
+      rack (>= 2.0.0)
+      rack-protection (>= 2.0.0)
+      redis (>= 4.1.0)
     signet (0.16.1)
       addressable (~> 2.8)
       faraday (>= 0.17.5, < 3.0)