Update rails requirement from >= 6.1, < 8.0 to >= 6.1, < 9.0

Updates the requirements on [rails](https://github.com/rails/rails) to permit the latest version.
- [Release notes](https://github.com/rails/rails/releases)
- [Commits](rails/rails@v6.1.0...v8.0.0)

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

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

Author: dependabot[bot]

client_side_validations.gemspec

@@ -28,5 +28,5 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = '>= 2.7'
 
   spec.add_dependency 'js_regex', '~> 3.7'
-  spec.add_dependency 'rails', '>= 6.1', '< 8.0'
+  spec.add_dependency 'rails', '>= 6.1', '< 9.0'
 end