Added missing cache context to url translation field.

Author: pmelab

modules/graphql_core/src/Plugin/GraphQL/Fields/Routing/Translate.php

@@ -19,6 +19,7 @@
  *   description = @Translation("The translated url object."),
  *   type = "Url",
  *   parents = {"Url"},
+ *   response_cache_contexts={"languages:language_url"},
  *   arguments = {
  *     "language" = "LanguageId!"
  *   }