Update rubocop-capybara requirement from = 2.21.0 to = 2.22.0

Updates the requirements on [rubocop-capybara](https://github.com/rubocop/rubocop-capybara) to permit the latest version.
- [Release notes](https://github.com/rubocop/rubocop-capybara/releases)
- [Changelog](https://github.com/rubocop/rubocop-capybara/blob/main/CHANGELOG.md)
- [Commits](rubocop/rubocop-capybara@v2.21.0...v2.22.0)

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

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

Author: dependabot[bot]

rubocop-govuk.gemspec

@@ -17,7 +17,7 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "rubocop", "1.73.2"
   spec.add_dependency "rubocop-ast", "1.38.1"
-  spec.add_dependency "rubocop-capybara", "2.21.0"
+  spec.add_dependency "rubocop-capybara", "2.22.0"
   spec.add_dependency "rubocop-rails", "2.30.3"
   spec.add_dependency "rubocop-rake", "0.7.1"
   spec.add_dependency "rubocop-rspec", "3.5.0"