Add suggestion to stop spring

Readme.md

@@ -98,11 +98,14 @@ Check out `change-prompt --help` for information about temporarily
 changing the prompt for the current Pry session.
 
 ## Disable pry-rails
+
 If pry-rails is included in your application but you would prefer not to use it, you may run the following command to set the appropriate environment variable to disable initialization and fall back to the default IRB console:
 ```shell
 DISABLE_PRY_RAILS=1 rails console
 ```
 
+Note that you may need to run `spring stop` first.
+
 # Developing and Testing
 
 This repo uses [Roadshow] to generate a [Docker Compose] file for each