README.md in rubocop-rspec-2.0.0.pre vs README.md in rubocop-rspec-2.0.0

@@ -21,9 +21,13 @@
 
 ```
 gem 'rubocop-rspec', require: false
 ```
 
+### Upgrading to RuboCop RSpec v2.x
+
+Read all the details in our [Upgrade to Version 2.x](https://docs.rubocop.org/rubocop-rspec/2.0/upgrade_to_version_2.html) document.
+
 ## Usage
 
 You need to tell RuboCop to load the RSpec extension. There are three
 ways to do this: