Update activerecord requirement from >= 6.1, < 7.1 to >= 6.1, < 7.2

Updates the requirements on [activerecord](https://github.com/rails/rails) to permit the latest version.
- [Release notes](https://github.com/rails/rails/releases)
- [Changelog](https://github.com/rails/rails/blob/v7.1.1/activerecord/CHANGELOG.md)
- [Commits](rails/rails@v6.1.0...v7.1.1)

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

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

ridgepole.gemspec

@@ -24,7 +24,7 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = Gem::Requirement.new('>= 2.7')
 
-  spec.add_dependency 'activerecord', '>= 6.1', '< 7.1'
+  spec.add_dependency 'activerecord', '>= 6.1', '< 7.2'
   spec.add_dependency 'diffy'
 
   spec.add_development_dependency 'appraisal', '>= 2.2.0'