Update json requirement from = 2.6.3 to 2.9.0

Updates the requirements on [json](https://github.com/ruby/json) to permit the latest version.
- [Release notes](https://github.com/ruby/json/releases)
- [Changelog](https://github.com/ruby/json/blob/master/CHANGES.md)
- [Commits](ruby/json@v2.6.3...v2.9.0)

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

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

Gemfile

@@ -14,11 +14,11 @@ def location_for(place_or_version, fake_version = nil)
 end
 
 group :development do
-  gem "json", '= 2.1.0',                         require: false if Gem::Requirement.create(['>= 2.5.0', '< 2.7.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
-  gem "json", '= 2.3.0',                         require: false if Gem::Requirement.create(['>= 2.7.0', '< 3.0.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
-  gem "json", '= 2.5.1',                         require: false if Gem::Requirement.create(['>= 3.0.0', '< 3.0.5']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
-  gem "json", '= 2.6.1',                         require: false if Gem::Requirement.create(['>= 3.1.0', '< 3.1.3']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
-  gem "json", '= 2.6.3',                         require: false if Gem::Requirement.create(['>= 3.2.0', '< 4.0.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '2.9.0',                         require: false if Gem::Requirement.create(['>= 2.5.0', '< 2.7.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '2.9.0',                         require: false if Gem::Requirement.create(['>= 2.7.0', '< 3.0.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '2.9.0',                         require: false if Gem::Requirement.create(['>= 3.0.0', '< 3.0.5']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '2.9.0',                         require: false if Gem::Requirement.create(['>= 3.1.0', '< 3.1.3']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '2.9.0',                         require: false if Gem::Requirement.create(['>= 3.2.0', '< 4.0.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
   gem "racc", '~> 1.4.0',                        require: false if Gem::Requirement.create(['>= 2.7.0', '< 3.0.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
   gem "deep_merge", '~> 1.0',                    require: false
   gem "voxpupuli-puppet-lint-plugins", '~> 5.0', require: false