fixing EntityValue example documentation by changing the langcode key value to >langcode<

src/Plugin/migrate/process/EntityValue.php

@@ -21,7 +21,6 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
  * the default of 'value'.
  *
  * For content entities, if a langcode is given, that translation is loaded.
- * The langcode is a reference so can be dynamic.
  *
  * Example:
  * @code
@@ -30,7 +29,7 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
  *     plugin: entity_value
  *     source: field_noderef/0/target_id
  *     entity_type: node
- *     langcode: @_langcode
+ *     langcode: en
  *     field_name: field_foo
  * @endcode
  *