Merge pull request #3874 from WiXSL/patch-docs-links-next

Updated links in docs.

docs/DataProviders.md

@@ -73,11 +73,11 @@ Developers from the react-admin community have open-sourced Data Providers for m
 * **[GraphQL](http://graphql.org/)**: [marmelab/ra-data-graphql](https://github.com/marmelab/react-admin/tree/master/packages/ra-data-graphql) (uses [Apollo](http://www.apollodata.com/))
 * **[HAL](http://stateless.co/hal_specification.html)**: [b-social/ra-data-hal](https://github.com/b-social/ra-data-hal)
 * **[Hasura](https://github.com/hasura/graphql-engine)**: [hasura/ra-data-hasura](https://github.com/hasura/graphql-engine/tree/master/community/tools/ra-data-hasura)
-* **[Hydra](http://www.hydra-cg.com/) / [JSON-LD](https://json-ld.org/)**: [api-platform/admin/hydra](https://github.com/api-platform/admin/blob/master/src/hydra/hydraClient.js)
+* **[Hydra](http://www.hydra-cg.com/) / [JSON-LD](https://json-ld.org/)**: [api-platform/admin/hydra](https://github.com/api-platform/admin/blob/master/src/hydra/dataProvider.js)
 * **[IndexedDB](https://developer.mozilla.org/en-US/docs/Web/API/IndexedDB_API)**: [tykoth/ra-data-dexie](https://github.com/tykoth/ra-data-dexie)
 * **[JSON API](http://jsonapi.org/)**: [henvo/ra-jsonapi-client](https://github.com/henvo/ra-jsonapi-client)
 * **[JSON HAL](https://tools.ietf.org/html/draft-kelly-json-hal-08)**: [ra-data-json-hal](https://www.npmjs.com/package/ra-data-json-hal)
-* **[JSON server](https://github.com/typicode/json-server)**: [marmelab/ra-data-json-server](https://github.com/marmelab/ra-data-json-server).
+* **[JSON server](https://github.com/typicode/json-server)**: [marmelab/ra-data-json-server](https://github.com/marmelab/react-admin/tree/master/packages/ra-data-json-server).
 * **[Loopback](https://loopback.io/)**: [darthwesker/react-admin-loopback](https://github.com/darthwesker/react-admin-loopback)
 * **[NestJS CRUD](https://github.com/nestjsx/crud)**: [FusionWorks/react-admin-nestjsx-crud-dataprovider](https://github.com/FusionWorks/react-admin-nestjsx-crud-dataprovider)
 * **[Parse](https://parseplatform.org/)**: [almahdi/ra-data-parse](https://github.com/almahdi/ra-data-parse)