Update puppetlabs_spec_helper requirement from ~> 3.0 to ~> 7.4

Updates the requirements on [puppetlabs_spec_helper](https://github.com/puppetlabs/puppetlabs_spec_helper) to permit the latest version.
- [Release notes](https://github.com/puppetlabs/puppetlabs_spec_helper/releases)
- [Changelog](https://github.com/puppetlabs/puppetlabs_spec_helper/blob/main/CHANGELOG.md)
- [Commits](puppetlabs/puppetlabs_spec_helper@v3.0.0...v7.4.0)

---
updated-dependencies:
- dependency-name: puppetlabs_spec_helper
  dependency-type: direct:development
...

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

Gemfile

@@ -11,7 +11,7 @@ group :tests do
   gem 'simplecov-console'
 
   # the test gems required for module testing
-  gem 'puppetlabs_spec_helper', '~> 3.0'
+  gem 'puppetlabs_spec_helper', '~> 7.4'
   gem 'rspec-puppet'
   gem 'codecov'
   gem 'rake', '~> 13.0'