chore(deps): Update activerecord requirement from >= 6.0, < 7.2 to >=…

… 6.0, < 7.3

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/v7.2.0/activerecord/CHANGELOG.md)
- [Commits](rails/rails@v6.0.0...v7.1.3.4)

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

Signed-off-by: dependabot[bot] <[email protected]>

blueprinter-activerecord.gemspec

@@ -23,7 +23,7 @@ Gem::Specification.new do |spec|
   spec.files = Dir['lib/**/*']
   spec.require_paths = ['lib']
 
-  spec.add_runtime_dependency 'activerecord', ['>= 6.0', '< 7.2']
+  spec.add_runtime_dependency 'activerecord', '>= 6.0', '< 7.3'
   spec.add_runtime_dependency 'blueprinter', '~> 1.0'
 
   spec.add_development_dependency 'appraisal', '~> 2.5'