Bump rubocop-govuk from 4.17.1 to 4.18.0

Bumps [rubocop-govuk](https://github.com/alphagov/rubocop-govuk) from 4.17.1 to 4.18.0.
- [Changelog](https://github.com/alphagov/rubocop-govuk/blob/main/CHANGELOG.md)
- [Commits](alphagov/rubocop-govuk@v4.17.1...v4.18.0)

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

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

Gemfile.lock

@@ -147,7 +147,7 @@ GEM
     combine_pdf (1.0.26)
       matrix
       ruby-rc4 (>= 0.1.5)
-    concurrent-ruby (1.2.3)
+    concurrent-ruby (1.3.1)
     connection_pool (2.4.1)
     crack (1.0.0)
       bigdecimal
@@ -319,7 +319,7 @@ GEM
     matrix (0.4.2)
     method_source (1.1.0)
     mini_mime (1.1.5)
-    minitest (5.23.0)
+    minitest (5.23.1)
     msgpack (1.7.2)
     multi_json (1.15.0)
     multi_xml (0.7.1)
@@ -371,7 +371,7 @@ GEM
     os (1.1.4)
     pagy (8.4.1)
     parallel (1.24.0)
-    parser (3.3.1.0)
+    parser (3.3.2.0)
       ast (~> 2.4.1)
       racc
     pdf-core (0.10.0)
@@ -490,7 +490,7 @@ GEM
       rspec-mocks (~> 3.13)
       rspec-support (~> 3.13)
     rspec-support (3.13.1)
-    rubocop (1.63.5)
+    rubocop (1.64.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
@@ -507,20 +507,20 @@ GEM
       rubocop (~> 1.41)
     rubocop-factory_bot (2.25.1)
       rubocop (~> 1.41)
-    rubocop-govuk (4.17.1)
-      rubocop (= 1.63.5)
+    rubocop-govuk (4.18.0)
+      rubocop (= 1.64.1)
       rubocop-ast (= 1.31.3)
       rubocop-rails (= 2.25.0)
       rubocop-rake (= 0.6.0)
-      rubocop-rspec (= 2.29.2)
+      rubocop-rspec (= 2.30.0)
     rubocop-rails (2.25.0)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.33.0, < 2.0)
       rubocop-ast (>= 1.31.1, < 2.0)
     rubocop-rake (0.6.0)
       rubocop (~> 1.0)
-    rubocop-rspec (2.29.2)
+    rubocop-rspec (2.30.0)
       rubocop (~> 1.40)
       rubocop-capybara (~> 2.17)
       rubocop-factory_bot (~> 2.22)