update test script (#31104)

Author: rtrieu

content/en/real_user_monitoring/mobile_and_tv_monitoring/react_native/advanced_configuration.md

@@ -29,7 +29,7 @@ Datadog provides mocks for the `'@datadog/mobile-react-native'` package. To use
 
 ```javascript
 jest.mock('@datadog/mobile-react-native', () => {
-    return require('@datadog/mobile-react-native/jest/mock');
+  return require('@datadog/mobile-react-native/jest')
 });
 ```