set doctrine.orm.controller_resolver.auto_mapping

it looks like doctrine bundle is about to deprecate
doctrine.orm.controller_resolver.auto_mapping and it's giving out
deprecation notice about this

explicitly set doctrine.orm.controller_resolver.auto_mapping: true as
suggested by deprecation log to keep existing behavior and remove the
notice

see doctrine/DoctrineBundle#1762 for more info

config/packages/doctrine.yaml

@@ -22,6 +22,8 @@ doctrine:
         validate_xml_mapping: true
         naming_strategy: doctrine.orm.naming_strategy.underscore_number_aware
         auto_mapping: true
+        controller_resolver:
+            auto_mapping: true
         mappings:
             App:
                 type: attribute