Update doctrine/DoctrineBundle doc branch (#3320)

Author: adriendupuis

docs/administration/configuration/repository_configuration.md

@@ -30,7 +30,7 @@ ibexa:
 
     It uses [Doctrine DBAL](https://www.doctrine-project.org/projects/doctrine-dbal/en/latest/) (Database Abstraction Layer).
     Database settings are supplied by [DoctrineBundle](https://github.com/doctrine/DoctrineBundle).
-    As such, you can refer to [DoctrineBundle's documentation](https://github.com/doctrine/DoctrineBundle/blob/2.18.x/docs/en/configuration.rst#doctrine-dbal-configuration).
+    As such, you can refer to [DoctrineBundle's documentation](https://github.com/doctrine/DoctrineBundle/blob/2.19.x/docs/en/configuration.rst#doctrine-dbal-configuration).
 
 If no repository is specified for a SiteAccess or SiteAccess group, the first repository defined under `ibexa.repositories` is used: