Merge pull request rails#44606 from 2017kamb/remove_typo_from_upgrading_rails_doc_file

Author: vipulnsward

guides/source/upgrading_ruby_on_rails.md

@@ -314,7 +314,7 @@ A few of highlights:
 
 * If you want to trace the activity of the autoloader, `ActiveSupport::Dependencies.verbose=` is no longer available, just throw `Rails.autoloaders.log!` in `config/application.rb`.
 
-Auxiliary internal classes or modules are also gone, like like `ActiveSupport::Dependencies::Reference`, `ActiveSupport::Dependencies::Blamable`, and others.
+Auxiliary internal classes or modules are also gone, like `ActiveSupport::Dependencies::Reference`, `ActiveSupport::Dependencies::Blamable`, and others.
 
 ### Autoloading during initialization