Build(deps-dev): bump rubocop-govuk from 5.1.11 to 5.1.12

Bumps [rubocop-govuk](https://github.com/alphagov/rubocop-govuk) from 5.1.11 to 5.1.12.
- [Changelog](https://github.com/alphagov/rubocop-govuk/blob/main/CHANGELOG.md)
- [Commits](alphagov/rubocop-govuk@v5.1.11...v5.1.12)

---
updated-dependencies:
- dependency-name: rubocop-govuk
  dependency-version: 5.1.12
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -79,7 +79,7 @@ GEM
     ast (2.4.3)
     base64 (0.3.0)
     benchmark (0.4.1)
-    bigdecimal (3.2.0)
+    bigdecimal (3.2.1)
     bootsnap (1.18.6)
       msgpack (~> 1.2)
     brakeman (7.0.2)
@@ -654,7 +654,7 @@ GEM
       rspec-mocks (~> 3.13)
       rspec-support (~> 3.13)
     rspec-support (3.13.2)
-    rubocop (1.75.7)
+    rubocop (1.75.8)
       json (~> 2.3)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.1.0)
@@ -671,8 +671,8 @@ GEM
     rubocop-capybara (2.22.1)
       lint_roller (~> 1.1)
       rubocop (~> 1.72, >= 1.72.1)
-    rubocop-govuk (5.1.11)
-      rubocop (= 1.75.7)
+    rubocop-govuk (5.1.12)
+      rubocop (= 1.75.8)
       rubocop-ast (= 1.44.1)
       rubocop-capybara (= 2.22.1)
       rubocop-rails (= 2.32.0)