docs: Update small README.md typo (#1447)

## Please verify the following:

- [x] `yarn build-and-test:local` passes
- [x] I have added tests for any new features, if relevant
- [x] `README.md` (or relevant documentation) has been updated with your
changes

## Describe your PR

Just a _tiny_ readme typo fix!

Co-authored-by: Nick Morgan <[email protected]>

Author: robwalkerco

README.md

@@ -23,7 +23,7 @@ Use Reactotron to:
 - show image overlay in React Native
 - track your Async Storage in React Native
 
-You plug it into your app as a dev dependency so it adds nothing to your product builds.
+You plug it into your app as a dev dependency so it adds nothing to your production builds.
 
 ### Desktop