Bump rubocop-govuk from 5.1.17 to 5.1.18

Bumps [rubocop-govuk](https://github.com/alphagov/rubocop-govuk) from 5.1.17 to 5.1.18.
- [Changelog](https://github.com/alphagov/rubocop-govuk/blob/main/CHANGELOG.md)
- [Commits](alphagov/rubocop-govuk@v5.1.17...v5.1.18)

---
updated-dependencies:
- dependency-name: rubocop-govuk
  dependency-version: 5.1.18
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -261,7 +261,7 @@ GEM
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
     jmespath (1.6.2)
-    json (2.12.2)
+    json (2.13.2)
     jwt (2.10.1)
       base64
     language_server-protocol (3.17.0.5)
@@ -345,7 +345,7 @@ GEM
       activerecord (>= 6.1)
       request_store (~> 1.4)
     parallel (1.27.0)
-    parser (3.3.8.0)
+    parser (3.3.9.0)
       ast (~> 2.4.1)
       racc
     pg (1.5.9)
@@ -458,15 +458,15 @@ GEM
       rubocop-ast (>= 1.45.1, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 4.0)
-    rubocop-ast (1.45.1)
+    rubocop-ast (1.46.0)
       parser (>= 3.3.7.2)
       prism (~> 1.4)
     rubocop-capybara (2.22.1)
       lint_roller (~> 1.1)
       rubocop (~> 1.72, >= 1.72.1)
-    rubocop-govuk (5.1.17)
+    rubocop-govuk (5.1.18)
       rubocop (= 1.78.0)
-      rubocop-ast (= 1.45.1)
+      rubocop-ast (= 1.46.0)
       rubocop-capybara (= 2.22.1)
       rubocop-rails (= 2.32.0)
       rubocop-rake (= 0.7.1)