docs: Update usage docs with latest jest config (#47)

Author: sbalay

README.md

@@ -87,7 +87,7 @@ package.
 ## Usage
 
 Import `@testing-library/jest-native/extend-expect` once (for instance in your
-[tests setup file](https://facebook.github.io/jest/docs/en/configuration.html#setuptestframeworkscriptfile-string))
+[tests setup file](https://jestjs.io/docs/en/configuration.html#setupfilesafterenv-array))
 and you're good to go:
 
 ```javascript