(CAT-1255) Release Gem with reference to the new name

Author: david22swan

puppet-lint.gemspec

@@ -8,6 +8,8 @@ Gem::Specification.new do |spec|
   spec.summary = 'Ensure your Puppet manifests conform with the Puppetlabs style guide'
   spec.description = <<-EOF
     Checks your Puppet manifests against the Puppetlabs style guide and alerts you to any discrepancies.
+    Note: Support for this gem has been moved under a new namespace and as such any future updates from
+    the Puppet team will be released as `puppetlabs-puppet-lint`.
   EOF
 
   spec.files = Dir[