Fix missing link to Doctrine ORM (#1256)

Author: Oryss

distribution/index.md

@@ -325,7 +325,7 @@ The only remaining task to have a working API is to be able to query and persist
 To retrieve and save data, API Platform proposes two main options (and we can mix them):
 
 1. Writing our own [data providers](../core/data-providers.md) and [data persisters](../core/data-persisters.md) to fetch and save data in any persistence system and trigger our custom business logic. This is what we recommend if you want to separate the public data model exposed by the API from the internal one, and to implement a layered architecture such as Clean Architecture or Hexagonal Architecture;
-2. Using one of the various existing data providers and persisters allowing to automatically fetch and persist data using popular persistence libraries. Out of the box, data providers and persisters are provided for Doctrine ORM] and [Doctrine MongoDB ODM](../core/mongodb.md). A data provider (but no persister yet) is also available for [Elasticsearch](../core/elasticsearch.md). [Pomm](https://github.com/pomm-project/pomm-api-platform) and [PHP Extended SQL](https://github.com/soyuka/esql#api-platform-bridge) also provides data providers and persisters for API Platform. We recommend this approach for Rapid Application Development.
+2. Using one of the various existing data providers and persisters allowing to automatically fetch and persist data using popular persistence libraries. Out of the box, data providers and persisters are provided for [Doctrine ORM](https://www.doctrine-project.org/projects/orm.html) and [Doctrine MongoDB ODM](../core/mongodb.md). A data provider (but no persister yet) is also available for [Elasticsearch](../core/elasticsearch.md). [Pomm](https://github.com/pomm-project/pomm-api-platform) and [PHP Extended SQL](https://github.com/soyuka/esql#api-platform-bridge) also provides data providers and persisters for API Platform. We recommend this approach for Rapid Application Development.
 
 Be sure to read the [General Design Considerations](../core/design.md) document to learn more about the architecture of API Platform and how to choose between these two approaches.