Update activesupport requirement from >= 4.2, < 7 to >= 4.2, < 8

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/v7.2.1/activesupport/CHANGELOG.md)
- [Commits](rails/rails@v4.2.0...v7.1.4)

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

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

Gemfile

@@ -6,7 +6,7 @@ source 'https://rubygems.org'
 gemspec
 
 # Development dependencies
-gem "activesupport", ">= 4.2", "< 7"
+gem "activesupport", ">= 4.2", "< 8"
 gem "gc_ruboconfig", "~> 5.0"
 gem "rake", "~> 13.0"
 gem "rspec", "~> 3.5"