Issue #3480844: Using a translatable string as a category for field type is deprecated

Closes #3480844

src/Plugin/Field/FieldType/Oauth2ScopeReferenceItem.php

@@ -16,7 +16,7 @@ use Drupal\simple_oauth\Oauth2ScopeInterface;
  *   id = "oauth2_scope_reference",
  *   label = @Translation("OAuth2 scope reference"),
  *   description = @Translation("An entity field containing a oauth2_scope reference."),
- *   category = @Translation("Reference"),
+ *   category = "reference",
  *   default_widget = "oauth2_scope_reference",
  *   list_class = "\Drupal\simple_oauth\Plugin\Field\FieldType\Oauth2ScopeReferenceItemList",
  * )