chore: point to v3 generator branch

Author: YOU54F

Gemfile

@@ -8,4 +8,7 @@ if ENV['X_PACT_DEVELOPMENT']
   gem "pact", path: '../pact'
   gem "pact-message", path: '../pact-message-ruby'
   gem "pact-support", path: '../pact-support'
+else
+  gem "pact-support", git: 'https://github.com/pact-foundation/pact-support.git', branch: 'feat/v3_generators'
+  gem "pact", git: 'https://github.com/pact-foundation/pact-ruby.git', branch: 'feat/v3_generators'
 end