fix regex check

Author: Darren Gipson

spec/classes/datadog_agent_spec.rb

@@ -1781,8 +1781,8 @@
           it 'adds an install_info' do
             expect(install_info['install_method']).to match(
               'tool' => 'puppet',
-              'tool_version' => %r{^puppet-unknown$}, # puppetversion is not set in tests, this field has to be tested manually
-              'installer_version' => %r{^datadog_module-\d+\.\d+\.\d+$},
+              'tool_version' => %r{^puppet-\d+\.\d+\.\d}, # puppetversion is not set in tests, this field has to be tested manually
+              'installer_version' => %r{^datadog_module-\d+\.\d+\.\d},
             )
           end
         end