Modify an example in the README

[ttanimichi]

We probably don't have config/environments/application.rb by default. Do you mean config/application.rb or config/environments/production.rb ?

$ rails new myapp
$ ls config/environments/
development.rb	production.rb	test.rb

[BookOfGreg]

I did mean config/application.rb yes.

Thank you for your help! 💚 💙