Bump rubocop-govuk from 4.14.0 to 4.18.0 (#760)

Bumps [rubocop-govuk](https://github.com/alphagov/rubocop-govuk) from 4.14.0 to 4.18.0.
- [Changelog](https://github.com/alphagov/rubocop-govuk/blob/main/CHANGELOG.md)
- [Commits](alphagov/rubocop-govuk@v4.14.0...v4.18.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -196,7 +196,7 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (2.7.1)
+    json (2.7.2)
     language_server-protocol (3.17.0.3)
     lograge (0.12.0)
       actionpack (>= 4)
@@ -238,8 +238,8 @@ GEM
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     pagy (6.5.0)
-    parallel (1.24.0)
-    parser (3.3.2.0)
+    parallel (1.25.1)
+    parser (3.3.3.0)
       ast (~> 2.4.1)
       racc
     pg (1.5.3)
@@ -328,40 +328,43 @@ GEM
       rspec-mocks (~> 3.12)
       rspec-support (~> 3.12)
     rspec-support (3.12.1)
-    rubocop (1.60.2)
+    rubocop (1.64.1)
       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-capybara (2.20.0)
+    rubocop-ast (1.31.3)
+      parser (>= 3.3.1.0)
+    rubocop-capybara (2.21.0)
       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-factory_bot (2.26.1)
+      rubocop (~> 1.61)
+    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 (= 2.26.1)
-    rubocop-rails (2.23.1)
+      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 (>= 1.30.0, < 2.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
     rubocop-rake (0.6.0)
       rubocop (~> 1.0)
-    rubocop-rspec (2.26.1)
+    rubocop-rspec (2.30.0)
       rubocop (~> 1.40)
       rubocop-capybara (~> 2.17)
       rubocop-factory_bot (~> 2.22)
+      rubocop-rspec_rails (~> 2.28)
+    rubocop-rspec_rails (2.29.1)
+      rubocop (~> 1.61)
     ruby-progressbar (1.13.0)
     rubyzip (2.3.2)
     sass (3.7.4)