Update activesupport requirement from >= 6.1, < 8 to >= 6.1, < 9

Updates the requirements on [activesupport](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/v8.0.0/activesupport/CHANGELOG.md)
- [Commits](rails/rails@v6.1.0...v7.1.5)

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

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

acts_as_paranoid.gemspec

@@ -22,7 +22,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency "activerecord", ">= 6.1", "< 8"
-  spec.add_dependency "activesupport", ">= 6.1", "< 8"
+  spec.add_dependency "activesupport", ">= 6.1", "< 9"
 
   spec.add_development_dependency "appraisal", "~> 2.3"
   spec.add_development_dependency "minitest", "~> 5.14"