docs(README): Avoid redirect in docs link also in label (#1023)

Author: klausi

README.md

@@ -12,6 +12,6 @@ This module requires composer for installation. To install, simply run `composer
 
 ### Resources
 
-* Documentation: [https://drupal-graphql.gitbook.io/graphql/v/8.x-4.x](https://drupal-graphql.gitbook.io/graphql/v/8.x-4.x/)
+* Documentation: [https://drupal-graphql.gitbook.io/graphql/v/8.x-4.x/](https://drupal-graphql.gitbook.io/graphql/v/8.x-4.x/)
 * Project homepage: [https://www.drupal.org/project/graphql](https://www.drupal.org/project/graphql)
 * Contributing: [https://github.com/drupal-graphql/graphql](https://github.com/drupal-graphql/graphql)