Bump rubocop-govuk from 4.14.0 to 4.15.0

Bumps [rubocop-govuk](https://github.com/alphagov/rubocop-govuk) from 4.14.0 to 4.15.0.
- [Changelog](https://github.com/alphagov/rubocop-govuk/blob/main/CHANGELOG.md)
- [Commits](alphagov/rubocop-govuk@v4.14.0...v4.15.0)

---
updated-dependencies:
- dependency-name: rubocop-govuk
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -597,37 +597,37 @@ GEM
       rspec-mocks (~> 3.0)
       sidekiq (>= 5, < 8)
     rspec-support (3.13.1)
-    rubocop (1.60.2)
+    rubocop (1.62.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
       parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.30.0, < 2.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.30.0)
-      parser (>= 3.2.1.0)
+    rubocop-ast (1.31.2)
+      parser (>= 3.3.0.4)
     rubocop-capybara (2.20.0)
       rubocop (~> 1.41)
     rubocop-factory_bot (2.25.1)
       rubocop (~> 1.41)
-    rubocop-govuk (4.14.0)
-      rubocop (= 1.60.2)
-      rubocop-ast (= 1.30.0)
-      rubocop-rails (= 2.23.1)
+    rubocop-govuk (4.15.0)
+      rubocop (= 1.62.1)
+      rubocop-ast (= 1.31.2)
+      rubocop-rails (= 2.24.0)
       rubocop-rake (= 0.6.0)
-      rubocop-rspec (= 2.26.1)
-    rubocop-rails (2.23.1)
+      rubocop-rspec (= 2.27.1)
+    rubocop-rails (2.24.0)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.33.0, < 2.0)
-      rubocop-ast (>= 1.30.0, < 2.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
     rubocop-rake (0.6.0)
       rubocop (~> 1.0)
-    rubocop-rspec (2.26.1)
+    rubocop-rspec (2.27.1)
       rubocop (~> 1.40)
       rubocop-capybara (~> 2.17)
       rubocop-factory_bot (~> 2.22)