Update rubocop-rails requirement from = 2.24.1 to = 2.25.0

Updates the requirements on [rubocop-rails](https://github.com/rubocop/rubocop-rails) to permit the latest version.
- [Release notes](https://github.com/rubocop/rubocop-rails/releases)
- [Changelog](https://github.com/rubocop/rubocop-rails/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rails@v2.24.1...v2.25.0)

---
updated-dependencies:
- dependency-name: rubocop-rails
  dependency-type: direct:production
...

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

rubocop-govuk.gemspec

@@ -17,7 +17,7 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "rubocop", "1.63.5"
   spec.add_dependency "rubocop-ast", "1.31.3"
-  spec.add_dependency "rubocop-rails", "2.24.1"
+  spec.add_dependency "rubocop-rails", "2.25.0"
   spec.add_dependency "rubocop-rake", "0.6.0"
   spec.add_dependency "rubocop-rspec", "2.29.2"
 end