fix(symfony): wire Symfony JsonEncoder if it exists (api-platform#5240)

Author: HeahDude

src/Symfony/Bundle/Resources/config/jsonld.xml

@@ -45,6 +45,7 @@
 
         <service id="api_platform.jsonld.encoder" class="ApiPlatform\Serializer\JsonEncoder" public="false">
             <argument>jsonld</argument>
+            <argument type="service" id="serializer.json.encoder" on-invalid="null" />
 
             <tag name="serializer.encoder" />
         </service>