Update README

Author: ondrejmirtes

README.md

@@ -20,7 +20,7 @@ parameters:
 		repositoryClass: MyApp\Doctrine\BetterEntityRepository
 ```
 
-Alternatively, you can provide your object manager and all custom repositories will be loaded
+You can opt in for more advanced analysis by providing the object manager from your own application. This will allow the correct entity `repositoryClass` to be inferred when accessing `$entityManager->getRepository()`:
 
 ```neon
 parameters: