Update specification/graph/_types/ExploreControls.ts

Co-authored-by: Abdon Pijpelink <abdon.pijpelink@elastic.co>

Author: szabosteve

specification/graph/_types/ExploreControls.ts

@@ -43,7 +43,7 @@ export class ExploreControls {
   timeout?: Duration
   /**
    * Filters associated terms so only those that are significantly associated with your query are included.
-   * @server_default True
+   * @server_default true
    * @doc_id search-aggregations-bucket-significantterms-aggregation
    */
   use_significance: boolean