Update passwords.rst

Author: andreybolonin

security/passwords.rst

@@ -626,7 +626,7 @@ you must register a service for it in order to use it as a named hasher:
         security:
             # ...
             password_hashers:
-                app_hasher:
+                App\Entity\User:
                     id: 'App\Security\Hasher\MyCustomPasswordHasher'
 
     .. code-block:: xml
@@ -842,7 +842,7 @@ Now, define a password hasher using the ``id`` setting:
         security:
             # ...
             password_hashers:
-                app_hasher:
+                App\Entity\User:
                     # the service ID of your custom hasher (the FQCN using the default services.yaml)
                     id: 'App\Security\Hasher\MyCustomPasswordHasher'